Cannot identify player

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.03.26.1. 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 Issues with outdated version will be rejected.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 2018.03.26.1

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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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 ```):

youtube-dl 'https://www.youtube.com/watch?v=hf04EYSifjE' --verbose
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'https://www.youtube.com/watch?v=hf04EYSifjE', u'--verbose']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.03.26
[debug] Python version 2.7.5 - Darwin-13.4.0-x86_64-i386-64bit
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] hf04EYSifjE: Downloading webpage
[youtube] hf04EYSifjE: Downloading video info webpage
[youtube] hf04EYSifjE: Extracting video information
WARNING: unable to extract uploader nickname
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] {22} signature length 44.45, html5 player None
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/youtube.py", line 1081, in _decrypt_signature
    video_id, player_url, s
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/youtube.py", line 969, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
ExtractorError: Cannot identify player u'https://www.youtube.com/yts/jsbin/player-vfl7rrrdV/en_US/base.js'; 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.
 (caused by ExtractorError(u"Cannot identify player u'https://www.youtube.com/yts/jsbin/player-vfl7rrrdV/en_US/base.js'; 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.",)); 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.
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/youtube.py", line 1081, in _decrypt_signature
    video_id, player_url, s
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/youtube.py", line 969, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
ExtractorError: Cannot identify player u'https://www.youtube.com/yts/jsbin/player-vfl7rrrdV/en_US/base.js'; 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.
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/youtube_dl/YoutubeDL.py", line 761, in extract_info
    ie_result = ie.extract(url)
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/common.py", line 428, in extract
    ie_result = self._real_extract(url)
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/youtube.py", line 1670, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/youtube.py", line 1091, in _decrypt_signature
    'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/youtube.py", line 1081, in _decrypt_signature
    video_id, player_url, s
  File "/Library/Python/2.7/site-packages/youtube_dl/extractor/youtube.py", line 969, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
ExtractorError: Cannot identify player u'https://www.youtube.com/yts/jsbin/player-vfl7rrrdV/en_US/base.js'; 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.
 (caused by ExtractorError(u"Cannot identify player u'https://www.youtube.com/yts/jsbin/player-vfl7rrrdV/en_US/base.js'; 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.",)); 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.

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If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

• Single video: https://www.youtube.com/watch?v=hf04EYSifjE

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Description of your issue, suggested solution and other information

I'll sporadically get this error for some videos, but not others. I can't explain what's going on with it, because it doesn't seem to have a pattern.