unable to extract html5 player

[CarlFK]

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.12.09.

• I've verified and I assure that I'm running youtube-dl 2018.12.09

Before submitting an issue make sure you have:

• [\x] 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 WARNING: unable to extract html5 player; please report this issue on https://yt-dl.org/bug

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The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

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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 ```):

p$ youtube-dl https://www.youtube.com/watch?v=qETXqSTznfI -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'https://www.youtube.com/watch?v=qETXqSTznfI', u'-v']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.12.09
[debug] Python version 2.7.12 (CPython) - Linux-4.4.0-139-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: ffmpeg 2.8.15-0ubuntu0.16.04.1, ffprobe 2.8.15-0ubuntu0.16.04.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] qETXqSTznfI: Downloading webpage
[youtube] qETXqSTznfI: 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 41.40, html5 player None
[youtube] qETXqSTznfI: Downloading player https://www.youtube.com/yts/jsbin/player_ias-vflXas3a_/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 41.40, 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 41.40, 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] {136} signature length 41.40, 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] {247} signature length 41.40, 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 41.40, 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 41.40, 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 41.40, 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 41.40, 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 41.40, 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 41.40, 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 41.40, 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 41.40, 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 41.40, 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 41.40, 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 41.40, 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 41.40, 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 41.40, 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 u'https://r3---sn-vgqskn7l.googlevideo.com/videoplayback?ip=98.223.145.234&aitags=133%2C134%2C135%2C136%2C160%2C242%2C243%2C244%2C247%2C278&lmt=1543170249257225&expire=1544792518&ms=au%2Crdu&mt=1544770830&mv=m&clen=13937161&source=youtube&id=o-AH1bBE3zUgJnzm23M9CZZkYG5K5p9U2LgNbtR85Y21-B&dur=299.999&fvip=3&mime=video%2Fwebm&gir=yes&c=WEB&mn=sn-vgqskn7l%2Csn-vgqsrnel&ei=ZlUTXJ2mEIe9jQTArr64Bg&requiressl=yes&itag=247&sparams=aitags%2Cclen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&keepalive=yes&txp=5432432&initcwndbps=1808750&ipbits=0&pl=20&mm=31%2C29&key=yt6&signature=76574D751817DACE0FFD1480887CBE57A511C7CC.57B8965B6C06FF82CFCEA00C54C1C3F85A6C7816&ratebypass=yes'
[download] Destination: Nightwish - Alpenglow (Instrumental_Karaoke)-qETXqSTznfI.f247.webm
[download] 100% of 13.29MiB in 00:36
[debug] Invoking downloader on u'https://r3---sn-vgqskn7l.googlevideo.com/videoplayback?ip=98.223.145.234&lmt=1434463931530742&expire=1544792518&ms=au%2Crdu&mt=1544770830&mv=m&clen=4766102&source=youtube&id=o-AH1bBE3zUgJnzm23M9CZZkYG5K5p9U2LgNbtR85Y21-B&dur=300.048&fvip=3&mime=audio%2Fmp4&gir=yes&c=WEB&ei=ZlUTXJ2mEIe9jQTArr64Bg&requiressl=yes&itag=140&sparams=clen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cexpire&keepalive=yes&initcwndbps=1808750&ipbits=0&pl=20&mm=31%2C29&mn=sn-vgqskn7l%2Csn-vgqsrnel&key=yt6&signature=D2CF321A1EC9D3F151AA2193CA6AFA0147D28C5F.3E2BFCA1314D4AAB15190479A99A3D356D604232&ratebypass=yes'
[download] Destination: Nightwish - Alpenglow (Instrumental_Karaoke)-qETXqSTznfI.f140.m4a
[download] 100% of 4.55MiB in 00:14
[ffmpeg] Merging formats into "Nightwish - Alpenglow (Instrumental_Karaoke)-qETXqSTznfI.mkv"
[debug] ffmpeg command line: ffmpeg -y -i 'file:Nightwish - Alpenglow (Instrumental_Karaoke)-qETXqSTznfI.f247.webm' -i 'file:Nightwish - Alpenglow (Instrumental_Karaoke)-qETXqSTznfI.f140.m4a' -c copy -map '0✌️0' -map '1🅰️0' 'file:Nightwish - Alpenglow (Instrumental_Karaoke)-qETXqSTznfI.temp.mkv'
Deleting original file Nightwish - Alpenglow (Instrumental_Karaoke)-qETXqSTznfI.f247.webm (pass -k to keep)
Deleting original file Nightwish - Alpenglow (Instrumental_Karaoke)-qETXqSTznfI.f140.m4a (pass -k to keep)