Cannot Download (Cannot determine left side of statement in 'Go.sH(a,2))

[VardaElbererth]

Error occurred while trying to download https://www.youtube.com/watch?v=6Ejga4kJUts.

[username@pies]$ youtube-dl --verbose https://www.youtube.com/watch?v=6Ejga4kJUts
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', 'https://www.youtube.com/watch?v=6Ejga4kJUts']
[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 3.4.1 - Linux-3.15.6-1-ARCH-x86_64-with-arch-Arch-Linux
[debug] Proxy map: {}
[youtube] Setting language
[youtube] 6Ejga4kJUts: Downloading webpage
[youtube] 6Ejga4kJUts: Downloading video info webpage
[youtube] 6Ejga4kJUts: Extracting video information
[youtube] 6Ejga4kJUts: Encrypted signatures detected.
[youtube] encrypted signature length 84 (28.55), itag 43, html5 player en_US-vflCGk6yw/html5player
[youtube] 6Ejga4kJUts: Downloading js player vflCGk6yw
WARNING: Writing cache to '/home/nimue/.cache/youtube-dl/youtube-sigfuncs/js_vflCGk6yw_84.json' failed: Traceback (most recent call last):
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 392, in _extract_signature_function
cache_res = res(test_string)
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 44, in interpret_statement
'Cannot determine left side of statement in %r' % stmt)
youtube_dl.utils.ExtractorError: Cannot determine left side of statement in 'Go.sH(a,2)'; 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/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
return func(s)
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 44, in interpret_statement
'Cannot determine left side of statement in %r' % stmt)
youtube_dl.utils.ExtractorError: Cannot determine left side of statement in 'Go.sH(a,2)'; 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/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
return func(s)
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 44, in interpret_statement
'Cannot determine left side of statement in %r' % stmt)
youtube_dl.utils.ExtractorError: Cannot determine left side of statement in 'Go.sH(a,2)'; 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/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
return func(s)
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 44, in interpret_statement
'Cannot determine left side of statement in %r' % stmt)
youtube_dl.utils.ExtractorError: Cannot determine left side of statement in 'Go.sH(a,2)'; 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.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3.4/site-packages/youtube_dl/YoutubeDL.py", line 516, in extract_info
ie_result = ie.extract(url)
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/common.py", line 169, in extract
return self._real_extract(url)
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 847, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 481, in _decrypt_signature
u'Automatic signature extraction failed: ' + tb, cause=e)
youtube_dl.utils.ExtractorError: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 477, in _decrypt_signature
return func(s)
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 450, in
return lambda s: initial_function([s])
File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 148, in resf
res = self.interpret_statement(stmt, local_vars)
File "/usr/lib/python3.4/site-packages/youtube_dl/jsinterp.py", line 44, in interpret_statement
'Cannot determine left side of statement in %r' % stmt)
youtube_dl.utils.ExtractorError: Cannot determine left side of statement in 'Go.sH(a,2)'; 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.

[phihag]

You are using an outdated version of youtube-dl (YouTube changed their player yesterday, so you'll need 2014.07.25 or newer). It looks like you used a package manager (pacman or pip) to install youtube-dl. Either update using that package manager (you may have to contact the package maintainer and request a new package) or uninstall the youtube-dl package and follow our manual installation instructions.