ERROR: Signature extraction failed

[Hydra82]

Resolved it on my own: switching format from mp4 to webm allowed the to video download.

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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 --verbose --format mp4 https://youtu.be/NhheiPTdZCw
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', '--format', 'mp4', 'https://youtu.be/NhheiPTdZCw']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2017.01.14
[debug] Python version 3.5.1 - Windows-10-10.0.14393-SP0
[debug] exe versions: ffmpeg N-83280-gcba4f0e, ffprobe N-83280-gcba4f0e
[debug] Proxy map: {}
[youtube] NhheiPTdZCw: Downloading webpage
[youtube] NhheiPTdZCw: Downloading video info webpage
[youtube] NhheiPTdZCw: 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 40.42, html5 player None
ERROR: Signature extraction failed: Traceback (most recent call last):
  File "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 1011, in _decrypt_signature
    video_id, player_url, s
  File "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 903, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
youtube_dl.utils.ExtractorError: Cannot identify player '/yts/jsbin/player-vflnNEucX/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("Cannot identify player '/yts/jsbin/player-vflnNEucX/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 "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 1011, in _decrypt_signature
    video_id, player_url, s
  File "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 903, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
youtube_dl.utils.ExtractorError: Cannot identify player '/yts/jsbin/player-vflnNEucX/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 "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 1011, in _decrypt_signature
    video_id, player_url, s
  File "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 903, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
youtube_dl.utils.ExtractorError: Cannot identify player '/yts/jsbin/player-vflnNEucX/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.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\YoutubeDL.py", line 694, in extract_info
    ie_result = ie.extract(url)
  File "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\common.py", line 359, in extract
    return self._real_extract(url)
  File "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 1590, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 1021, in _decrypt_signature
    'Signature extraction failed: ' + tb, cause=e)
youtube_dl.utils.ExtractorError: Signature extraction failed: Traceback (most recent call last):
  File "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 1011, in _decrypt_signature
    video_id, player_url, s
  File "C:\Users\hydra-win\AppData\Local\Programs\Python\Python35\lib\site-packages\youtube_dl\extractor\youtube.py", line 903, in _extract_signature_function
    raise ExtractorError('Cannot identify player %r' % player_url)
youtube_dl.utils.ExtractorError: Cannot identify player '/yts/jsbin/player-vflnNEucX/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("Cannot identify player '/yts/jsbin/player-vflnNEucX/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.
...
<end of log>

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[s104346]

[debug] youtube-dl version 2017.01.14

Update to the latest version.

[Hydra82]

uh, 2017.01.14 is the latest version on the website for the exe, as of now https://yt-dl.org/latest/youtube-dl.exe.
when I click that link and type -verbose it displays 2017.01.14

[3reetop]

I get the same error and im on version 2017.12.14, I'm trying to use mps-youtube but it raises this exception when I search anything on it

[Hrxn]

Please post log with --verbose option.