Unable to download from youtube.com when logged in with a valid cookie

[harroguk]

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.09.06
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones

Verbose log

Request subscription playlist (To prove my cookie is good)

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-j', '--flat-playlist', '--cookies', 'D:\\scripts\\Powershell\\youtube-dl\\cookies.txt', '--playlist-end', '10', '--verbose', 'https://www.youtube.com/feed/subscriptions']
[debug] Encodings: locale cp1252, fs utf-8, out utf-8, pref cp1252
[debug] youtube-dl version 2020.09.06
[debug] Python version 3.8.3 (CPython) - Windows-2012ServerR2-6.3.9600-SP0
[debug] exe versions: ffmpeg git-2020-06-03-b6d7c4c, ffprobe git-2020-06-03-b6d7c4c
[debug] Proxy map: {}
{"_type": "url", "url": "7CwF3TpvcT0", "ie_key": "Youtube", "title": "Final Judging: 2020 Generative Design in Minecraft Competition"}
{"_type": "url", "url": "FmTxV3Qr-ro", "ie_key": "Youtube", "title": "Halo 3 Mythbusters - Vol. 5"}
{"_type": "url", "url": "YzA5EvBDOp0", "ie_key": "Youtube", "title": "Kingdoms of Amalur: Re-Reckoning Gameplay - Ellen Plays KoA LIVE!"}
{"_type": "url", "url": "6SfJ3Lj3zKg", "ie_key": "Youtube", "title": "7 Weirdest Things People Have Played Videogames On"}
{"_type": "url", "url": "AS1DgLmvlV0", "ie_key": "Youtube", "title": "CD Projekt Clarifies Microtransaction Controversy | New Xbox Price Revealed | Avengers Tops Charts"}
{"_type": "url", "url": "3oycBiqs6Rw", "ie_key": "Youtube", "title": "You're Grounded | FailArmy"}
{"_type": "url", "url": "jbERnd5EOAk", "ie_key": "Youtube", "title": "EA Tried Putting Intrusive Adverts Into UFC 4 Because It's Pure Slime"}
{"_type": "url", "url": "GFsSmRuBHps", "ie_key": "Youtube", "title": "The Importance Of The Overtake Button"}
{"_type": "url", "url": "qEzx5aGNxQw", "ie_key": "Youtube", "title": "Crash Bandicoot 4: It's About Time - New Character Reveal"}
{"_type": "url", "url": "hhX-X9Vhj0U", "ie_key": "Youtube", "title": "Russell Peters Talks Hip-Hop and Lists His Top 5 Comedians | Tacos Con Todo"}

Request first video from playlist (To show error)

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--cookies', 'D:\\scripts\\Powershell\\youtube-dl\\cookies.txt', '--verbose', '--output', 'D:\\TV\\YouTube\\%(uploader)s [%(channel_id)s]\\%(uploader)s - s2020e1090818%(playlist_index)s - %(title)s  [%(id)s].%(ex
t)s', 'https://www.youtube.com/watch?v=7CwF3TpvcT0']
[debug] Encodings: locale cp1252, fs utf-8, out utf-8, pref cp1252
[debug] youtube-dl version 2020.09.06
[debug] Python version 3.8.3 (CPython) - Windows-2012ServerR2-6.3.9600-SP0
[debug] exe versions: ffmpeg git-2020-06-03-b6d7c4c, ffprobe git-2020-06-03-b6d7c4c
[debug] Proxy map: {}
[youtube] 7CwF3TpvcT0: Downloading webpage
ERROR: 7CwF3TpvcT0: YouTube said: Unable to extract video data
Traceback (most recent call last):
  File "c:\installedprograms\python38\lib\site-packages\youtube_dl\YoutubeDL.py", line 797, in extract_info
    ie_result = ie.extract(url)
  File "c:\installedprograms\python38\lib\site-packages\youtube_dl\extractor\common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "c:\installedprograms\python38\lib\site-packages\youtube_dl\extractor\youtube.py", line 1893, in _real_extract
    raise ExtractorError(
youtube_dl.utils.ExtractorError: 7CwF3TpvcT0: YouTube said: Unable to extract video data

Request same video without cookie (To show that its something that my users is specifically being served)

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', '--output', 'D:\\TV\\YouTube\\%(uploader)s [%(channel_id)s]\\%(uploader)s - s2020e1090818%(playlist_index)s - %(title)s  [%(id)s].%(ext)s', 'https://www.youtube.com/watch?v=7CwF3TpvcT0']
[debug] Encodings: locale cp1252, fs utf-8, out utf-8, pref cp1252
[debug] youtube-dl version 2020.09.06
[debug] Python version 3.8.3 (CPython) - Windows-2012ServerR2-6.3.9600-SP0
[debug] exe versions: ffmpeg git-2020-06-03-b6d7c4c, ffprobe git-2020-06-03-b6d7c4c
[debug] Proxy map: {}
[youtube] 7CwF3TpvcT0: Downloading webpage
[youtube] 7CwF3TpvcT0: Downloading m3u8 information
[youtube] 7CwF3TpvcT0: Downloading MPD manifest
[debug] Default format spec: best/bestvideo+bestaudio
[debug] Invoking downloader on 'https://manifest.googlevideo.com/api/manifest/hls_playlist/expire/1599615598/ei/Dt5XX7XRCoGPwQGZ2ImQBw/ip/174.91.53.73/id/7CwF3TpvcT0.0/itag/300/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/g
oi/160/sgoap/gir%3Dyes%3Bitag%3D140/sgovp/gir%3Dyes%3Bitag%3D298/hls_chunk_host/r2---sn-cxaaj5o5q5-tt1y.googlevideo.com/playlist_duration/30/manifest_duration/30/vprv/1/playlist_type/DVR/mh/D3/mm/44/mn/sn-cxaaj5o5q5-tt1y/ms/lva/mv/u/mvi/2/p
l/24/dover/11/keepalive/yes/mt/1599593645/disable_polymer/true/sparams/expire,ei,ip,id,itag,source,requiressl,ratebypass,live,goi,sgoap,sgovp,playlist_duration,manifest_duration,vprv,playlist_type/sig/AOq0QJ8wRAIgTQ42t4WLYySDYk7CAuEChK3NywU
NJasbx4_YiNaFm2YCIGZuoOMZvP_-A8Pzos8PxsKXonIZsaRzudMZdZdYYt3M/lsparams/hls_chunk_host,mh,mm,mn,ms,mv,mvi,pl/lsig/AG3C_xAwRgIhAIGPpONiXXxA79M2P-4Z1xMB3D4YQcyzorgMya6QlKnRAiEAhuTadwuWPGWAHpesgO1Ia9FWYXsht7NhurObjpcTd9w%3D/playlist/index.m3u8'

[download] Destination: D:\TV\YouTube\AI and Games [UCov_51F0betb6hJ6Gumxg3Q]\AI and Games - s2020e1090818NA - Final Judging - 2020 Generative Design in Minecraft Competition  [7CwF3TpvcT0].mp4
[debug] ffmpeg command line: ffmpeg -y -loglevel verbose -headers "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3616.1 Safari/537.36
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
" -i "https://manifest.googlevideo.com/api/manifest/hls_playlist/expire/1599615598/ei/Dt5XX7XRCoGPwQGZ2ImQBw/ip/174.91.53.73/id/7CwF3TpvcT0.0/itag/300/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/goi/160/sgoap/gir%3Dyes%3Bi
tag%3D140/sgovp/gir%3Dyes%3Bitag%3D298/hls_chunk_host/r2---sn-cxaaj5o5q5-tt1y.googlevideo.com/playlist_duration/30/manifest_duration/30/vprv/1/playlist_type/DVR/mh/D3/mm/44/mn/sn-cxaaj5o5q5-tt1y/ms/lva/mv/u/mvi/2/pl/24/dover/11/keepalive/ye
s/mt/1599593645/disable_polymer/true/sparams/expire,ei,ip,id,itag,source,requiressl,ratebypass,live,goi,sgoap,sgovp,playlist_duration,manifest_duration,vprv,playlist_type/sig/AOq0QJ8wRAIgTQ42t4WLYySDYk7CAuEChK3NywUNJasbx4_YiNaFm2YCIGZuoOMZv
P_-A8Pzos8PxsKXonIZsaRzudMZdZdYYt3M/lsparams/hls_chunk_host,mh,mm,mn,ms,mv,mvi,pl/lsig/AG3C_xAwRgIhAIGPpONiXXxA79M2P-4Z1xMB3D4YQcyzorgMya6QlKnRAiEAhuTadwuWPGWAHpesgO1Ia9FWYXsht7NhurObjpcTd9w%3D/playlist/index.m3u8" -c copy -f mp4 "-bsf:a" a
ac_adtstoasc "file:D:\TV\YouTube\AI and Games [UCov_51F0betb6hJ6Gumxg3Q]\AI and Games - s2020e1090818NA - Final Judging - 2020 Generative Design in Minecraft Competition  [7CwF3TpvcT0].mp4.part"
ffmpeg version git-2020-06-03-b6d7c4c Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200523
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --
enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom
--disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 49.100 / 56. 49.100
  libavcodec     58. 90.100 / 58. 90.100
  libavformat    58. 44.100 / 58. 44.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 84.100 /  7. 84.100
  libswscale      5.  6.101 /  5.  6.101
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[tcp @ 000000010b9426c0] Starting connection attempt to 172.217.164.206 port 443
[tcp @ 000000010b9426c0] Successfully connected to 172.217.164.206 port 443
[snip]

Description

In order to obtain my subscription playlist I need to use --cookie (which is working)
However if I attempt to download a video by using the same cookie then the download is "Unable to extract video data"
If I attempt to download the same video without providing the cookie then the video downloads successfully.

To me this implies I am being served a non-standard page when I am logged in.

[blackjack4494]

You could get the playlist first with cookie and then download the videos in the playlist without using cookies.

[harroguk]

Yup, however its not working as designed, hence the bug report.