Automatic signature extraction failed

[plavcik]

youtube-dl --verbose "https://www.youtube.com/watch?v=tsbGu_wWX4I"
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--title', '--verbose', 'https://www.youtube.com/watch?v=tsbGu_wWX4I']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.07.23.2
[debug] Python version 2.7.5 - Darwin-13.3.0-x86_64-i386-64bit
[debug] Proxy map: {}
[youtube] Setting language
[youtube] tsbGu_wWX4I: Downloading webpage
[youtube] tsbGu_wWX4I: Downloading video info webpage
[youtube] tsbGu_wWX4I: Extracting video information
[youtube] tsbGu_wWX4I: Encrypted signatures detected.
[youtube] encrypted signature length 83 (55.27), itag 18, html5 player en_US-vfl9FYC6l
[youtube] tsbGu_wWX4I: Downloading js player vfl9FYC6l
WARNING: Writing cache to u'/Users/navratil/.cache/youtube-dl/youtube-sigfuncs/js_vfl9FYC6l_83.json' failed: Traceback (most recent call last):
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 392, in _extract_signature_function
    cache_res = res(test_string)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in 
    return lambda s: initial_function([s])
  File "/Users/navratil/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
    res = self.interpret_statement(stmt, local_vars)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/jsinterp.py", line 44, in interpret_statement
    'Cannot determine left side of statement in %r' % stmt)
ExtractorError: Cannot determine left side of statement in u'jo.Dv(a,28)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.

ERROR: Automatic signature extraction failed: Traceback (most recent call last):
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
    return func(s)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in 
    return lambda s: initial_function([s])
  File "/Users/navratil/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
    res = self.interpret_statement(stmt, local_vars)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/jsinterp.py", line 44, in interpret_statement
    'Cannot determine left side of statement in %r' % stmt)
ExtractorError: Cannot determine left side of statement in u'jo.Dv(a,28)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
Traceback (most recent call last):
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
    return func(s)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in 
    return lambda s: initial_function([s])
  File "/Users/navratil/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
    res = self.interpret_statement(stmt, local_vars)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/jsinterp.py", line 44, in interpret_statement
    'Cannot determine left side of statement in %r' % stmt)
ExtractorError: Cannot determine left side of statement in u'jo.Dv(a,28)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
Traceback (most recent call last):
  File "/Users/navratil/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 516, in extract_info
    ie_result = ie.extract(url)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/common.py", line 169, in extract
    return self._real_extract(url)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 847, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 481, in _decrypt_signature
    u'Automatic signature extraction failed: ' + tb, cause=e)
ExtractorError: Automatic signature extraction failed: Traceback (most recent call last):
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
    return func(s)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in 
    return lambda s: initial_function([s])
  File "/Users/navratil/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
    res = self.interpret_statement(stmt, local_vars)
  File "/Users/navratil/bin/youtube-dl/youtube_dl/jsinterp.py", line 44, in interpret_statement
    'Cannot determine left side of statement in %r' % stmt)
ExtractorError: Cannot determine left side of statement in u'jo.Dv(a,28)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.
; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type  youtube-dl -U  to update.

[jaimeMF]

Duplicate of #3334.

[phihag]

Support for the new YouTube player type has been added in youtube-dl v2014.07.24. Type youtube-dl -U to update.