Can't download YouTube videos this evening PDT.

[antdude]

$ youtube-dl --verbose "https://www.youtube.com/watch?v=UfGMj10wOzg"
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', 'https://www.youtube.com/watch?v=UfGMj10wOzg']
[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 2.7.3 - Linux-3.2.0-4-amd64-x86_64-with-debian-7.6
[debug] Proxy map: {}
[youtube] Setting language
[youtube] UfGMj10wOzg: Downloading webpage
[youtube] UfGMj10wOzg: Downloading video info webpage
[youtube] UfGMj10wOzg: Extracting video information
[youtube] UfGMj10wOzg: Encrypted signatures detected.
[youtube] encrypted signature length 83 (55.27), itag 22, html5 player en_US-vfl9FYC6l
[youtube] UfGMj10wOzg: Downloading js player vfl9FYC6l
WARNING: Writing cache to u'/home/ant/.cache/youtube-dl/youtube-sigfuncs/js_vfl9FYC6l_83.json' failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 392, in _extract_signature_function
cache_res = res(test_string)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/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 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
return func(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/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 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
return func(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/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 "/usr/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 516, in extract_info
ie_result = ie.extract(url)
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 169, in extract
return self._real_extract(url)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 847, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/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 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
return func(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/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.

More:
https://www.youtube.com/watch?v=C7dPqrmDWxs
https://www.youtube.com/watch?v=qFHzmDZcL34
etc.

Thank you in advance. :)

[rubybrawler]

I am having same issue. Did youtube change the way the signatures are structured?

[antdude]

Rubybrawler: I'd assume so. YouTube is getting picky. I hate VEVO. They always block downloads. We'll have to wait for the developers to fix it. I noticed it happening a lot and they have to fix it. It's a battle! :(

[vectorsigma]

I, too, noticed the same problem just now. It was with a VEVO video as well. I tried a regular video and it downloaded with no problem.

Below is the output I received from running the latest version, 2014.7.23, in Fedora with --verbose enabled:

$ youtube-dl -t --verbose "http://www.youtube.com/watch?v=8Gv0H-vPoDc"
[debug] System config: ['--prefer-free-formats']
[debug] User config: []
[debug] Command-line args: ['-t', '--verbose', 'http://www.youtube.com/watch?v=8Gv0H-vPoDc']
[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 - Linux-3.14.9-200.fc20.x86_64-x86_64-with-fedora-20-Heisenbug
[debug] Proxy map: {}
[youtube] Setting language
[youtube] 8Gv0H-vPoDc: Downloading webpage
[youtube] 8Gv0H-vPoDc: Downloading video info webpage
[youtube] 8Gv0H-vPoDc: Extracting video information
[youtube] 8Gv0H-vPoDc: Encrypted signatures detected.
[youtube] encrypted signature length 83 (55.27), itag 22, html5 player en_US-vflkX5nuy\/html5player
[youtube] 8Gv0H-vPoDc: Downloading js player vflkX5nuy
WARNING: Writing cache to u'/home/user/.cache/youtube-dl/youtube-sigfuncs/js_vflkX5nuy_83.json' failed: Traceback (most recent call last):
  File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 392, in _extract_signature_function
    cache_res = res(test_string)
  File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in <lambda>
    return lambda s: initial_function([s])
  File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
    res = self.interpret_statement(stmt, local_vars)
  File "/usr/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 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
    return func(s)
  File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in <lambda>
    return lambda s: initial_function([s])
  File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
    res = self.interpret_statement(stmt, local_vars)
  File "/usr/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 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
    return func(s)
  File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in <lambda>
    return lambda s: initial_function([s])
  File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
    res = self.interpret_statement(stmt, local_vars)
  File "/usr/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 "/usr/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 516, in extract_info
    ie_result = ie.extract(url)
  File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 169, in extract
    return self._real_extract(url)
  File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 847, in _real_extract
    encrypted_sig, video_id, player_url, age_gate)
  File "/usr/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 "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
    return func(s)
  File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 450, in <lambda>
    return lambda s: initial_function([s])
  File "/usr/bin/youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
    res = self.interpret_statement(stmt, local_vars)
  File "/usr/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.

[DabKick]

Not working for me too. here's the output:

domU-12-31-39-09-14-01:/usr/local/bin # ./youtube-dl -v McEoTIqoRKk
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-v', 'McEoTIqoRKk']
[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 2.6.8 - Linux-2.6.32.19-0.3-ec2-i686-with-SuSE-11-i586
[debug] Proxy map: {}
[youtube] Setting language
[youtube] McEoTIqoRKk: Downloading webpage
[youtube] McEoTIqoRKk: Downloading video info webpage
[youtube] McEoTIqoRKk: Extracting video information
[youtube] McEoTIqoRKk: Encrypted signatures detected.
[youtube] encrypted signature length 83 (55.27), itag 22, html5 player en_US-vfl9FYC6l
[youtube] McEoTIqoRKk: Downloading js player vfl9FYC6l
WARNING: Writing cache to u'/root/.cache/youtube-dl/youtube-sigfuncs/js_vfl9FYC6l_83.json' failed: Traceback (most recent call last):
File "./youtube-dl/youtube_dl/extractor/youtube.py", line 392, in _extract_signature_function
cache_res = res(test_string)
File "./youtube-dl/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "./youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "./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 "./youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
return func(s)
File "./youtube-dl/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "./youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "./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 "./youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
return func(s)
File "./youtube-dl/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "./youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "./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 "./youtube-dl/youtube_dl/YoutubeDL.py", line 516, in extract_info
ie_result = ie.extract(url)
File "./youtube-dl/youtube_dl/extractor/common.py", line 169, in extract
return self._real_extract(url)
File "./youtube-dl/youtube_dl/extractor/youtube.py", line 847, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "./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 "./youtube-dl/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
return func(s)
File "./youtube-dl/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "./youtube-dl/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "./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.

[Kebabpizza]

Same.

D:\dev\sync>youtube-dl https://www.youtube.com/watch?v=NG7BqEdYWZg --verbose
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['https://www.youtube.com/watch?v=NG7BqEdYWZg', '--verbose']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2014.07.23.2
[debug] Python version 2.7.8 - Windows-7-6.1.7601-SP1
[debug] Proxy map: {}
[youtube] Setting language
[youtube] NG7BqEdYWZg: Downloading webpage
[youtube] NG7BqEdYWZg: Downloading video info webpage
[youtube] NG7BqEdYWZg: Extracting video information
[youtube] NG7BqEdYWZg: Encrypted signatures detected.
[youtube] encrypted signature length 83 (55.27), itag 22, html5 player en_US-vflkX5nuy/html5player
[youtube] NG7BqEdYWZg: Downloading js player vflkX5nuy
WARNING: Writing cache to u'C:\Users\RotabLand/.cache\youtube-dl\youtube-sigfuncs\js_vflkX5nuy_83.json' failed: Traceback (most recent call last):
File "youtube_dl\extractor\youtube.pyo", line 392, in _extract_signature_function
File "youtube_dl\extractor\youtube.pyo", line 450, in
File "youtube_dl\jsinterp.pyo", line 148, in resf
File "youtube_dl\jsinterp.pyo", line 44, in interpret_statement
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 "youtube_dl\extractor\youtube.pyo", line 477, in _decrypt_signature
File "youtube_dl\extractor\youtube.pyo", line 450, in
File "youtube_dl\jsinterp.pyo", line 148, in resf
File "youtube_dl\jsinterp.pyo", line 44, in interpret_statement
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 "youtube_dl\extractor\youtube.pyo", line 477, in _decrypt_signature
File "youtube_dl\extractor\youtube.pyo", line 450, in
File "youtube_dl\jsinterp.pyo", line 148, in resf
File "youtube_dl\jsinterp.pyo", line 44, in interpret_statement
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 "youtube_dl\YoutubeDL.pyo", line 516, in extract_info
File "youtube_dl\extractor\common.pyo", line 169, in extract
File "youtube_dl\extractor\youtube.pyo", line 847, in _real_extract
File "youtube_dl\extractor\youtube.pyo", line 481, in _decrypt_signature
ExtractorError: Automatic signature extraction failed: Traceback (most recent call last):
File "youtube_dl\extractor\youtube.pyo", line 477, in _decrypt_signature
File "youtube_dl\extractor\youtube.pyo", line 450, in
File "youtube_dl\jsinterp.pyo", line 148, in resf
File "youtube_dl\jsinterp.pyo", line 44, in interpret_statement
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 version 2014.07.24. Type youtube-dl -U to update.