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Warning: Falling back to static signature algorithm #2316
Comments
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Also I am on the latest version. |
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Same here. Happening on multiple videos. Causes omxplayer to freak out and exit. EDIT: I should note that the URL it outputs at the end does not play. pi@raspberrypi ~ $ youtube-dl --verbose -g http://www.youtube.com/watch?v=KQ6zr6kCPj8 WARNING: Automatic signature extraction failed: Traceback (most recent call last): WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Automatic signature extraction failed: Traceback (most recent call last): WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm |
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Just ran youtube-dl -U. Seems to be fixed. EDIT: Failed again on the same video. Worked once then just threw the same errors. Seems weird for this to be sporadic. |
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Could you run |
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[youtube] uSD4vsh1zDA: Extracting video information [youtube] uSD4vsh1zDA: Downloading js player mVwz WARNING: Automatic signature extraction failed: Traceback (most recent call last WARNING: Warning: Falling back to static signature algorithm WARNING: Automatic signature extraction failed: Traceback (most recent call last WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Automatic signature extraction failed: Traceback (most recent call last WARNING: Warning: Falling back to static signature algorithm WARNING: Automatic signature extraction failed: Traceback (most recent call last WARNING: Warning: Falling back to static signature algorithm WARNING: Automatic signature extraction failed: Traceback (most recent call last WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm WARNING: Warning: Falling back to static signature algorithm |
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Updating has helped a lot, still getting some 403's though, leaving it for a few minutes and trying again appears to work in the majority of cases, not sure if its just luck or limits by google. |
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@guernica777 Can you post the full output you get when the error occurs, with a current version of youtube-dl? |
I am getting an error when trying to download a youtube video.
Command: /usr/local/bin/youtube-dl -g http://www.youtube.com/watch?v=uSD4vsh1zDA
The resulting URL at the bottom does not play the video...
Any help would be greatly appreciated. The full output is below.
WARNING: Writing cache to u'/Users/masovies/.cache/youtube-dl/youtube-sigfuncs/js_mVwz_90.json' failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 369, in _extract_signature_function
cache_res = res(test_string)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; 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.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; 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.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; 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.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Writing cache to u'/Users/masovies/.cache/youtube-dl/youtube-sigfuncs/js_mVwz_84.json' failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 369, in _extract_signature_function
cache_res = res(test_string)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; 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.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; 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.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; 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.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; 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.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; 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.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; 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.
WARNING: Warning: Falling back to static signature algorithm
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
ExtractorError: Unsupported JS expression u'$y(a,7)'; 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.
WARNING: Warning: Falling back to static signature algorithm
https://r15---sn-nwj7knl7.googlevideo.com/videoplayback?sver=3&ratebypass=yes&sparams=gcr%2Cid%2Cip%2Cipbits%2Citag%2Cratebypass%2Csource%2Cupn%2Cexpire&id=b920f8bec875cc30&key=yt5&expire=1391578558&ms=au&fexp=923902%2C936910%2C936913&itag=18&ipbits=0&mt=1391558126&gcr=us&source=youtube&mv=m&upn=EvMxNrDI_GI&ip=76.21.11.140&signature=A91BD1B2887690EF45B46B8B65254467FB573D9E45CC.52CB117935FAB08D46D05745B2CC45EE3C