[youtube] Some videos give a warning: unable to extract html5 player

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.11.23. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2018.11.23

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones
• Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add the -v flag to your command line you run youtube-dl with (youtube-dl -v <your command line>), copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

youtube-dl oCLsa98D7iU -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['oCLsa98D7iU', '-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.11.23
[debug] Python version 3.7.1 (CPython) - Linux-4.19.2-arch1-1-ARCH-x86_64-with-arch
[debug] exe versions: ffmpeg n4.1, ffprobe n4.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] oCLsa98D7iU: Downloading webpage
[youtube] oCLsa98D7iU: Downloading video info webpage
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {18} signature length 43.43, html5 player None
[youtube] oCLsa98D7iU: Downloading player https://www.youtube.com/yts/jsbin/player_ias-vflfmGnOV/en_US/base.js
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {36} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {17} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {135} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {244} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {134} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {243} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {133} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {242} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {160} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {278} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {140} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {171} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {249} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {250} signature length 43.43, html5 player None
WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
[youtube] {251} signature length 43.43, html5 player None
[debug] Default format spec: bestvideo+bestaudio/best
WARNING: Requested formats are incompatible for merge and will be merged into mkv.
[debug] Invoking downloader on 'https://r1---sn-fpobv-1gie.googlevideo.com/videoplayback?ms=au%2Crdu&fvip=1&sparams=aitags%2Cclen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&mt=1543106897&mv=m&mime=video%2Fmp4&id=o-AGX4alVzKb7fP8OT-GLaVKywPENf4nvVLaYxj9SaNbMT&pl=49&aitags=133%2C134%2C135%2C160%2C242%2C243%2C244%2C278&gir=yes&key=yt6&ip=2a02%3A21b0%3A644d%3A4566%3A2a42%3Ae8d9%3Aabf7%3Ad510&mn=sn-fpobv-1gie%2Csn-1gi7znes&ipbits=0&mm=31%2C29&txp=5532432&c=WEB&lmt=1540914358467464&source=youtube&initcwndbps=693750&dur=285.799&clen=20248283&expire=1543128626&ei=0vH5W5XHI43m7gOtjaGYBQ&keepalive=yes&itag=135&requiressl=yes&signature=6372EAF2709859E1523471C0776DCAC589D53D3E.90C73ABBC1D552AF64CB83592EBAF068889EBAA4&ratebypass=yes'
[download] Destination: God - John Lennon ( Remastered 2007 )  HD-oCLsa98D7iU.f135.mp4
[download] 100% of 19.31MiB in 00:09
[debug] Invoking downloader on 'https://r1---sn-fpobv-1gie.googlevideo.com/videoplayback?ms=au%2Crdu&fvip=1&sparams=clen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&mt=1543106897&mv=m&mime=audio%2Fwebm&id=o-AGX4alVzKb7fP8OT-GLaVKywPENf4nvVLaYxj9SaNbMT&pl=49&gir=yes&key=yt6&ip=2a02%3A21b0%3A644d%3A4566%3A2a42%3Ae8d9%3Aabf7%3Ad510&mn=sn-fpobv-1gie%2Csn-1gi7znes&ipbits=0&mm=31%2C29&txp=5511222&c=WEB&lmt=1540914748745459&source=youtube&initcwndbps=693750&dur=285.861&clen=4536402&expire=1543128626&ei=0vH5W5XHI43m7gOtjaGYBQ&keepalive=yes&itag=251&requiressl=yes&signature=49F2B8ED22FFD1C23646AF77BF792FFBDAEB9908.6296342495BF1A1D9843E7607BA2E9C94FC51DE1&ratebypass=yes'
[download] Destination: God - John Lennon ( Remastered 2007 )  HD-oCLsa98D7iU.f251.webm
[download] 100% of 4.33MiB in 00:02
[ffmpeg] Merging formats into "God - John Lennon ( Remastered 2007 )  HD-oCLsa98D7iU.mkv"
[debug] ffmpeg command line: ffmpeg -y -i 'file:God - John Lennon ( Remastered 2007 )  HD-oCLsa98D7iU.f135.mp4' -i 'file:God - John Lennon ( Remastered 2007 )  HD-oCLsa98D7iU.f251.webm' -c copy -map 0:v:0 -map 1:a:0 'file:God - John Lennon ( Remastered 2007 )  HD-oCLsa98D7iU.temp.mkv'
Deleting original file God - John Lennon ( Remastered 2007 )  HD-oCLsa98D7iU.f135.mp4 (pass -k to keep)
Deleting original file God - John Lennon ( Remastered 2007 )  HD-oCLsa98D7iU.f251.webm (pass -k to keep)
...
<end of log>

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Description of your issue, suggested solution and other information

Some YouTube videos give a warning when being downloaded with youtube-dl (see the log output above).

There is a PR (#18296) addressing this issue.

[alistairboyer]

I don't know why you closed this! The error is real the fix is good!