ExtractorError: Unsupported JS expression u'$y(a,7)';

[bsumesh90901]

[youtube] Setting language
[youtube] ktvTqknDobU: Downloading webpage
[youtube] ktvTqknDobU: Downloading video info webpage
[youtube] ktvTqknDobU: Extracting video information
[youtube] ktvTqknDobU: Encrypted signatures detected.
[youtube] ktvTqknDobU: Downloading js player mVwz
WARNING: Writing cache to u'/home/me/.cache/youtube-dl/youtube-sigfuncs/js_mVwz_90.json' failed: Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 369, in _extract_signature_function
cache_res = res(test_string)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python2.7/dist-packages/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/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python2.7/dist-packages/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/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python2.7/dist-packages/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/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
return func(s)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 530, in
return lambda s: initial_function([s])
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 525, in resf
res = interpret_statement(stmt, local_vars)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
v = interpret_expression(expr, local_vars, allow_recursion)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
raise ExtractorError(u'Unsupported JS expression %r' % expr)
....
....
....
....
WARNING: Warning: Falling back to static signature algorithm
328 WARNING: Automatic signature extraction failed: Traceback (most recent call last):
329 File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 962, in _decrypt_signature
330 return func(s)
331 File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 530, in
332 return lambda s: initial_function([s])
333 File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 525, in resf
334 res = interpret_statement(stmt, local_vars)
335 File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 460, in interpret_statement
336 v = interpret_expression(expr, local_vars, allow_recursion)
337 File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 513, in interpret_expression
338 raise ExtractorError(u'Unsupported JS expression %r' % expr)
339 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 in clude its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
340
341 WARNING: Warning: Falling back to static signature algorithm
342 ERROR: unable to download video data: HTTP Error 403: Forbidden

[phihag]

Duplicate of #2303. This has been fixed in youtue-dl v 2014.02.05.1 and newer. Update to a current version of youtube-dl to fix this.

[bsumesh90901]

Thanks. I had to manually download the latest from your site. My package manager is not picking up the latest. Is the latest not hosted in the repo?

[phihag]

That depends on which distribution you are using. You can contact your distribution's maintainer, it should be noted alongside the package, or file a bug in your distirbution's issue tracker.