Youtube-dl does not download all the udemy course vtt files

[ajitgoel]

• [x ] I'm reporting a broken site support issue
• [ x] I've verified that I'm running youtube-dl version 2020.09.20
• [ x] I've checked that all provided URLs are alive and playable in a browser
• [ x] I've checked that all URLs and arguments with special characters are properly quoted or escaped
• [ x] I've searched the bugtracker for similar bug reports including closed ones
• [ x] I've read bugs section in FAQ

Verbose log

PASTE VERBOSE LOG HERE

C:\Users\ajitg\Downloads>youtube-dl -v --write-sub --cookies ./udemy-cookies.txt --skip-download https://www.udemy.com/70534-azure/
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', '--write-sub', '--cookies', './udemy-cookies.txt', '--skip-download', 'https://www.udemy.com/70534-azure/']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2020.09.20
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.19041
[debug] exe versions: ffmpeg N-99395-ga3a6b56200, ffprobe N-99395-ga3a6b56200
[debug] Proxy map: {}
[udemy:course] 70534-azure: Downloading webpage
[udemy:course] 802578: Downloading course curriculum
[download] Downloading playlist: 802578
[udemy:course] playlist 802578: Collected 214 video ids (downloading 214 of them)
[download] Downloading video 1 of 214
[udemy] 17313412: Downloading webpage
[udemy] 17313412: Downloading lecture JSON
[udemy] 26438084: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Course Introduction to AZ-300_AZ-303 Azure Architect-26438084.en.vtt
[download] Downloading video 2 of 214
[udemy] 17313414: Downloading webpage
[udemy] 17313414: Downloading lecture JSON
[udemy] 27004354: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 3 of 214
[udemy] 17313416: Downloading webpage
[udemy] 17313416: Downloading lecture JSON
[udemy] 26159798: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 4 of 214
[udemy] 17313418: Downloading webpage
[udemy] 17313418: Downloading lecture JSON
[udemy] 27509594: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 5 of 214
[udemy] 17326238: Downloading webpage
[udemy] 17326238: Downloading lecture JSON
[udemy] 26438064: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: NEW_ Details of the AZ-303 Beta Exam-26438064.en.vtt
[download] Downloading video 6 of 214
[udemy] 16311472: Downloading webpage
[udemy] 16311472: Downloading lecture JSON
[udemy] 20057814: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: What's So Great About Cloud Computing-20057814.en.vtt
[download] Downloading video 7 of 214
[udemy] 16311474: Downloading webpage
[udemy] 16311474: Downloading lecture JSON
[udemy] 20057810: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: DEMO - Create a VM in 6 Minutes-20057810.en.vtt
[download] Downloading video 8 of 214
[udemy] 16311476: Downloading webpage
[udemy] 16311476: Downloading lecture JSON
[udemy] 20057818: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Other Cloud Computing Options-20057818.en.vtt
[download] Downloading video 9 of 214
[udemy] 16311478: Downloading webpage
[udemy] 16311478: Downloading lecture JSON
[udemy] 20057802: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: DEMO - Create a Container in 4 Minutes-20057802.en.vtt
[download] Downloading video 10 of 214
[udemy] 16311482: Downloading webpage
[udemy] 16311482: Downloading lecture JSON
[udemy] 26438112: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Azure Regions and Geos _UPDATED-26438112.en.vtt
[download] Downloading video 11 of 214
[udemy] 16311486: Downloading webpage
[udemy] 16311486: Downloading lecture JSON
[udemy] 20057812: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Azure Global Network-20057812.en.vtt
[download] Downloading video 12 of 214
[udemy] 16311488: Downloading webpage
[udemy] 16311488: Downloading lecture JSON
[udemy] 20057816: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Cloud Concepts - Availability and Scaling-20057816.en.vtt
[download] Downloading video 13 of 214
[udemy] 16311490: Downloading webpage
[udemy] 16311490: Downloading lecture JSON
[udemy] 20057808: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Cloud Concepts - Elasticity, Faults, and Recovery-20057808.en.vtt
[download] Downloading video 14 of 214
[udemy] 16311492: Downloading webpage
[udemy] 16311492: Downloading lecture JSON
[udemy] 20057804: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Cloud Concepts - Final Thoughts-20057804.en.vtt
[download] Downloading video 15 of 214
[udemy] 16270492: Downloading webpage
[udemy] 16270492: Downloading lecture JSON
[udemy] 20002782: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 16 of 214
[udemy] 13300048: Downloading webpage
[udemy] 13300048: Downloading lecture JSON
[udemy] 21600852: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 17 of 214
[udemy] 13299922: Downloading webpage
[udemy] 13299922: Downloading lecture JSON
[udemy] 27526486: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 18 of 214
[udemy] 12996932: Downloading webpage
[udemy] 12996932: Downloading lecture JSON
[udemy] 16197374: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 19 of 214
[udemy] 12996934: Downloading webpage
[udemy] 12996934: Downloading lecture JSON
[udemy] 15822070: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 20 of 214
[udemy] 13300794: Downloading webpage
[udemy] 13300794: Downloading lecture JSON
[udemy] 16198038: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 21 of 214
[udemy] 12996936: Downloading webpage
[udemy] 12996936: Downloading lecture JSON
[udemy] 15822068: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 22 of 214
[udemy] 12996938: Downloading webpage
[udemy] 12996938: Downloading lecture JSON
[udemy] 15822078: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 23 of 214
[udemy] 12996942: Downloading webpage
[udemy] 12996942: Downloading lecture JSON
[udemy] 15822076: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 24 of 214
[udemy] 17396578: Downloading webpage
[udemy] 17396578: Downloading lecture JSON
[udemy] 21501152: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 25 of 214
[udemy] 15960636: Downloading webpage
[udemy] 15960636: Downloading lecture JSON
[udemy] 19600874: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 26 of 214
[udemy] 15960648: Downloading webpage
[udemy] 15960648: Downloading lecture JSON
[udemy] 19600876: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 27 of 214
[udemy] 17402654: Downloading webpage
[udemy] 17402654: Downloading lecture JSON
[udemy] 21507502: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 28 of 214
[udemy] 15960860: Downloading webpage
[udemy] 15960860: Downloading lecture JSON
[udemy] 19601052: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 29 of 214
[udemy] 15960862: Downloading webpage
[udemy] 15960862: Downloading lecture JSON
[udemy] 19601054: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 30 of 214
[udemy] 12996954: Downloading webpage
[udemy] 12996954: Downloading lecture JSON
[udemy] 15822126: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 31 of 214
[udemy] 12996956: Downloading webpage
[udemy] 12996956: Downloading lecture JSON
[udemy] 15822098: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 32 of 214
[udemy] 12996958: Downloading webpage
[udemy] 12996958: Downloading lecture JSON
[udemy] 15822092: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 33 of 214
[udemy] 12996960: Downloading webpage
[udemy] 12996960: Downloading lecture JSON
[udemy] 15822096: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 34 of 214
[udemy] 12996964: Downloading webpage
[udemy] 12996964: Downloading lecture JSON
[udemy] 15822102: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 35 of 214
[udemy] 13875950: Downloading webpage
[udemy] 13875950: Downloading lecture JSON
[udemy] 16933610: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 36 of 214
[udemy] 12996882: Downloading webpage
[udemy] 12996882: Downloading lecture JSON
[udemy] 15822048: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 37 of 214
[udemy] 12996884: Downloading webpage
[udemy] 12996884: Downloading lecture JSON
[udemy] 15822046: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 38 of 214
[udemy] 12996886: Downloading webpage
[udemy] 12996886: Downloading lecture JSON
[udemy] 15822050: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 39 of 214
[udemy] 12996892: Downloading webpage
[udemy] 12996892: Downloading lecture JSON
[udemy] 15822056: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 40 of 214
[udemy] 12996894: Downloading webpage
[udemy] 12996894: Downloading lecture JSON
[udemy] 15822052: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 41 of 214
[udemy] 12996896: Downloading webpage
[udemy] 12996896: Downloading lecture JSON
[udemy] 15822054: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 42 of 214
[udemy] 12996898: Downloading webpage
[udemy] 12996898: Downloading lecture JSON
[udemy] 15822058: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 43 of 214
[udemy] 12996904: Downloading webpage
[udemy] 12996904: Downloading lecture JSON
[udemy] 15822062: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 44 of 214
[udemy] 12996908: Downloading webpage
[udemy] 12996908: Downloading lecture JSON
[udemy] 15822060: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 45 of 214
[udemy] 12996912: Downloading webpage
[udemy] 12996912: Downloading lecture JSON
[udemy] 15822066: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 46 of 214
[udemy] 12996916: Downloading webpage
[udemy] 12996916: Downloading lecture JSON
[udemy] 15822064: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 47 of 214
[udemy] 12996924: Downloading webpage
[udemy] 12996924: Downloading lecture JSON
[udemy] 15822074: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 48 of 214
[udemy] 17326700: Downloading webpage
[udemy] 17326700: Downloading lecture JSON
[udemy] 21407560: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 49 of 214
[udemy] 12996918: Downloading webpage
[udemy] 12996918: Downloading lecture JSON
[udemy] 15822140: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 50 of 214
[udemy] 21264436: Downloading webpage
[udemy] 21264436: Downloading lecture JSON
[udemy] 26543864: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 51 of 214
[udemy] 17402644: Downloading webpage
[udemy] 17402644: Downloading lecture JSON
[udemy] 21507658: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 52 of 214
[udemy] 12996972: Downloading webpage
[udemy] 12996972: Downloading lecture JSON
[udemy] 15822084: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 53 of 214
[udemy] 12996976: Downloading webpage
[udemy] 12996976: Downloading lecture JSON
[udemy] 15822142: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 54 of 214
[udemy] 12996978: Downloading webpage
[udemy] 12996978: Downloading lecture JSON
[udemy] 15822158: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 55 of 214
[udemy] 17403346: Downloading webpage
[udemy] 17403346: Downloading lecture JSON
[udemy] 21508772: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 56 of 214
[udemy] 12996966: Downloading webpage
[udemy] 12996966: Downloading lecture JSON
[udemy] 21594276: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 57 of 214
[udemy] 17468546: Downloading webpage
[udemy] 17468546: Downloading lecture JSON
[udemy] 21594286: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 58 of 214
[udemy] 12996970: Downloading webpage
[udemy] 12996970: Downloading lecture JSON
[udemy] 21594292: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 59 of 214
[udemy] 17468920: Downloading webpage
[udemy] 17468920: Downloading lecture JSON
[udemy] 21594558: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 60 of 214
[udemy] 16350214: Downloading webpage
[udemy] 16350214: Downloading lecture JSON
[udemy] 20108482: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 61 of 214
[udemy] 16350218: Downloading webpage
[udemy] 16350218: Downloading lecture JSON
[udemy] 20108480: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 62 of 214
[udemy] 17396582: Downloading webpage
[udemy] 17396582: Downloading lecture JSON
[udemy] 21501158: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 63 of 214
[udemy] 12996982: Downloading webpage
[udemy] 12996982: Downloading lecture JSON
[udemy] 20188148: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 64 of 214
[udemy] 12996984: Downloading webpage
[udemy] 12996984: Downloading lecture JSON
[udemy] 15822088: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 65 of 214
[udemy] 12996986: Downloading webpage
[udemy] 12996986: Downloading lecture JSON
[udemy] 15822162: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 66 of 214
[udemy] 12996988: Downloading webpage
[udemy] 12996988: Downloading lecture JSON
[udemy] 15822134: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 67 of 214
[udemy] 12996994: Downloading webpage
[udemy] 12996994: Downloading lecture JSON
[udemy] 15822122: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 68 of 214
[udemy] 12996996: Downloading webpage
[udemy] 12996996: Downloading lecture JSON
[udemy] 15822156: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 69 of 214
[udemy] 12997000: Downloading webpage
[udemy] 12997000: Downloading lecture JSON
[udemy] 15822114: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 70 of 214
[udemy] 12997006: Downloading webpage
[udemy] 12997006: Downloading lecture JSON
[udemy] 15822138: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 71 of 214
[udemy] 12997008: Downloading webpage
[udemy] 12997008: Downloading lecture JSON
[udemy] 15822128: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 72 of 214
[udemy] 12997078: Downloading webpage
[udemy] 12997078: Downloading lecture JSON
[udemy] 15822120: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 73 of 214
[udemy] 12997088: Downloading webpage
[udemy] 12997088: Downloading lecture JSON
[udemy] 15822150: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 74 of 214
[udemy] 12997100: Downloading webpage
[udemy] 12997100: Downloading lecture JSON
[udemy] 15822104: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 75 of 214
[udemy] 12997104: Downloading webpage
[udemy] 12997104: Downloading lecture JSON
[udemy] 15822094: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 76 of 214
[udemy] 12997108: Downloading webpage
[udemy] 12997108: Downloading lecture JSON
[udemy] 15822110: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 77 of 214
[udemy] 12997112: Downloading webpage
[udemy] 12997112: Downloading lecture JSON
[udemy] 15822130: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 78 of 214
[udemy] 12997116: Downloading webpage
[udemy] 12997116: Downloading lecture JSON
[udemy] 15822152: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 79 of 214
[udemy] 12997122: Downloading webpage
[udemy] 12997122: Downloading lecture JSON
[udemy] 15822160: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 80 of 214
[udemy] 12997144: Downloading webpage
[udemy] 12997144: Downloading lecture JSON
[udemy] 15822100: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 81 of 214
[udemy] 12997154: Downloading webpage
[udemy] 12997154: Downloading lecture JSON
[udemy] 15822118: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 82 of 214
[udemy] 12997256: Downloading webpage
[udemy] 12997256: Downloading lecture JSON
[udemy] 15822132: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 83 of 214
[udemy] 12997262: Downloading webpage
[udemy] 12997262: Downloading lecture JSON
[udemy] 15822154: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 84 of 214
[udemy] 12997266: Downloading webpage
[udemy] 12997266: Downloading lecture JSON
[udemy] 15822136: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 85 of 214
[udemy] 12997272: Downloading webpage
[udemy] 12997272: Downloading lecture JSON
[udemy] 15822106: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 86 of 214
[udemy] 12997276: Downloading webpage
[udemy] 12997276: Downloading lecture JSON
[udemy] 15822124: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 87 of 214
[udemy] 17396584: Downloading webpage
[udemy] 17396584: Downloading lecture JSON
[udemy] 21501160: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 88 of 214
[udemy] 12997304: Downloading webpage
[udemy] 12997304: Downloading lecture JSON
[udemy] 15822116: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 89 of 214
[udemy] 12997306: Downloading webpage
[udemy] 12997306: Downloading lecture JSON
[udemy] 15822144: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 90 of 214
[udemy] 12997308: Downloading webpage
[udemy] 12997308: Downloading lecture JSON
[udemy] 15822090: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 91 of 214
[udemy] 12997314: Downloading webpage
[udemy] 12997314: Downloading lecture JSON
[udemy] 15822146: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 92 of 214
[udemy] 12997318: Downloading webpage
[udemy] 12997318: Downloading lecture JSON
[udemy] 15822108: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 93 of 214
[udemy] 12997324: Downloading webpage
[udemy] 12997324: Downloading lecture JSON
[udemy] 15822080: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 94 of 214
[udemy] 12997326: Downloading webpage
[udemy] 12997326: Downloading lecture JSON
[udemy] 15822148: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 95 of 214
[udemy] 13007950: Downloading webpage
[udemy] 13007950: Downloading lecture JSON
[udemy] 15835268: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 96 of 214
[udemy] 13007954: Downloading webpage
[udemy] 13007954: Downloading lecture JSON
[udemy] 15835270: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 97 of 214
[udemy] 13007956: Downloading webpage
[udemy] 13007956: Downloading lecture JSON
[udemy] 15835276: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 98 of 214
[udemy] 13007960: Downloading webpage
[udemy] 13007960: Downloading lecture JSON
[udemy] 15835274: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 99 of 214
[udemy] 15961456: Downloading webpage
[udemy] 15961456: Downloading lecture JSON
[udemy] 19602246: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 100 of 214
[udemy] 16372570: Downloading webpage
[udemy] 16372570: Downloading lecture JSON
[udemy] 20139200: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 101 of 214
[udemy] 16372574: Downloading webpage
[udemy] 16372574: Downloading lecture JSON
[udemy] 20139204: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 102 of 214
[udemy] 16372580: Downloading webpage
[udemy] 16372580: Downloading lecture JSON
[udemy] 20139208: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 103 of 214
[udemy] 16381178: Downloading webpage
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[udemy] 20151618: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 13300864: Downloading webpage
[udemy] 13300864: Downloading lecture JSON
[udemy] 16198190: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 16198192: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 16933704: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 13876000: Downloading webpage
[udemy] 13876000: Downloading lecture JSON
[udemy] 16933710: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 13007146: Downloading webpage
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[udemy] 15834356: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 15960018: Downloading webpage
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 13008386: Downloading webpage
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[udemy] 15835554: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 131 of 214
[udemy] 21207434: Downloading webpage
[udemy] 21207434: Downloading lecture JSON
[udemy] 26479736: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Create an Azure Virtual Machine (VM)-26479736.en.vtt
[download] Downloading video 132 of 214
[udemy] 21207438: Downloading webpage
[udemy] 21207438: Downloading lecture JSON
[udemy] 26605306: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Test the Connection-26605306.en.vtt
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[udemy] 26501790: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Adjust Network Security Group Settings-26501790.en.vtt
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[udemy] 26605308: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Resize a Virtual Machine-26605308.en.vtt
[download] Downloading video 135 of 214
[udemy] 21207456: Downloading webpage
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[udemy] 26605310: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Add a Data Disk-26605310.en.vtt
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[udemy] 21207458: Downloading webpage
[udemy] 21207458: Downloading lecture JSON
[udemy] 26711366: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Place a VM in an Availability Set-26711366.en.vtt
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[udemy] 21207462: Downloading webpage
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[udemy] 26711364: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[info] Writing video subtitles to: Place a VM in an Availability Zone-26711364.en.vtt
[download] Downloading video 138 of 214
[udemy] 21207464: Downloading webpage
[udemy] 21207464: Downloading lecture JSON
[udemy] 26945920: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 21207468: Downloading webpage
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 144 of 214
[udemy] 21798564: Downloading webpage
[udemy] 21798564: Downloading lecture JSON
[udemy] 27607966: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 145 of 214
[udemy] 21798568: Downloading webpage
[udemy] 21798568: Downloading lecture JSON
[udemy] 27607976: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 146 of 214
[udemy] 21798570: Downloading webpage
[udemy] 21798570: Downloading lecture JSON
[udemy] 27679832: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 147 of 214
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[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 148 of 214
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[udemy] 27679858: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 150 of 214
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[udemy] 27679862: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 151 of 214
[udemy] 21809408: Downloading webpage
[udemy] 21809408: Downloading lecture JSON
[udemy] 27796590: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 152 of 214
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[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 153 of 214
[udemy] 21809414: Downloading webpage
[udemy] 21809414: Downloading lecture JSON
[udemy] 27796588: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 21875764: Downloading webpage
[udemy] 21875764: Downloading lecture JSON
[udemy] 27796586: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 155 of 214
[udemy] 21875770: Downloading webpage
[udemy] 21875770: Downloading lecture JSON
[udemy] 27909002: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 156 of 214
[udemy] 21875772: Downloading webpage
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[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 157 of 214
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 21875778: Downloading webpage
[udemy] 21875778: Downloading lecture JSON
[udemy] 27909010: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 21875780: Downloading webpage
[udemy] 21875780: Downloading lecture JSON
[udemy] 27909004: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 21875782: Downloading webpage
[udemy] 21875782: Downloading lecture JSON
[udemy] 27909008: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 161 of 214
[udemy] 21875786: Downloading webpage
[udemy] 21875786: Downloading lecture JSON
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[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 162 of 214
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 21875810: Downloading webpage
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[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 167 of 214
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 21875814: Downloading webpage
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 21875816: Downloading webpage
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[udemy] 27992278: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 170 of 214
[udemy] 21876440: Downloading webpage
[udemy] 21876440: Downloading lecture JSON
[udemy] 27992280: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 171 of 214
[udemy] 22066074: Downloading webpage
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[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 172 of 214
[udemy] 22066078: Downloading webpage
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 22115376: Downloading webpage
[udemy] 22115376: Downloading lecture JSON
[udemy] 27677154: Downloading m3u8 information
WARNING: Failed to download m3u8 information: The read operation timed out
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 187 of 214
[udemy] 22115382: Downloading webpage
[udemy] 22115382: Downloading lecture JSON
[udemy] 27677162: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 188 of 214
[udemy] 22115386: Downloading webpage
[udemy] 22115386: Downloading lecture JSON
[udemy] 27677166: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 189 of 214
[udemy] 22115402: Downloading webpage
[udemy] 22115402: Downloading lecture JSON
[udemy] 27677158: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 22115404: Downloading webpage
[udemy] 22115404: Downloading lecture JSON
[udemy] 27677164: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 191 of 214
[udemy] 22115410: Downloading webpage
[udemy] 22115410: Downloading lecture JSON
[udemy] 27677174: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 192 of 214
[udemy] 22115416: Downloading webpage
[udemy] 22115416: Downloading lecture JSON
[udemy] 27677188: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 193 of 214
[udemy] 22115418: Downloading webpage
[udemy] 22115418: Downloading lecture JSON
[udemy] 27677192: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 22115426: Downloading webpage
[udemy] 22115426: Downloading lecture JSON
[udemy] 27677184: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 195 of 214
[udemy] 22115434: Downloading webpage
[udemy] 22115434: Downloading lecture JSON
[udemy] 27677200: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 196 of 214
[udemy] 22115440: Downloading webpage
[udemy] 22115440: Downloading lecture JSON
[udemy] 27677206: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 197 of 214
[udemy] 22115454: Downloading webpage
[udemy] 22115454: Downloading lecture JSON
[udemy] 27677190: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 22115458: Downloading webpage
[udemy] 22115458: Downloading lecture JSON
[udemy] 27677168: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 199 of 214
[udemy] 22115464: Downloading webpage
[udemy] 22115464: Downloading lecture JSON
[udemy] 27677180: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 200 of 214
[udemy] 22115476: Downloading webpage
[udemy] 22115476: Downloading lecture JSON
[udemy] 27677170: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 201 of 214
[udemy] 22115480: Downloading webpage
[udemy] 22115480: Downloading lecture JSON
[udemy] 27677186: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 202 of 214
[udemy] 22115484: Downloading webpage
[udemy] 22115484: Downloading lecture JSON
[udemy] 27677194: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 203 of 214
[udemy] 22115488: Downloading webpage
[udemy] 22115488: Downloading lecture JSON
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 22115496: Downloading lecture JSON
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 22115500: Downloading webpage
[udemy] 22115500: Downloading lecture JSON
[udemy] 27677204: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 206 of 214
[udemy] 22115504: Downloading webpage
[udemy] 22115504: Downloading lecture JSON
[udemy] 27677202: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 207 of 214
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[udemy] 22115506: Downloading lecture JSON
[udemy] 27677178: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 22115510: Downloading lecture JSON
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 22115512: Downloading lecture JSON
[udemy] 27677198: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Downloading video 210 of 214
[udemy] 22115514: Downloading webpage
[udemy] 22115514: Downloading lecture JSON
[udemy] 27677196: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 22375218: Downloading lecture JSON
[udemy] 28016632: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 15587818: Downloading lecture JSON
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[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 13005274: Downloading webpage
[udemy] 13005274: Downloading lecture JSON
[udemy] 20002770: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
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[udemy] 19373360: Downloading webpage
[udemy] 19373360: Downloading lecture JSON
[udemy] 24055182: Downloading m3u8 information
[debug] Default format spec: bestvideo+bestaudio/best
[download] Finished downloading playlist: 802578

Description

I am trying to download all the udemy course vtt files so I can use it for my studies. I am using the youtube-dl -v --write-sub --cookies ./udemy-cookies.txt --skip-download https://www.udemy.com/70534-azure/ command, Youtube-dl downloads just 15 odd files out of more than 220 and then stops. The youtube dl logs also do not show much. What am I missing?