unable to download youtube-video yXQViqx6GMY

[Garionion]

Signature extraction failed: Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 530, in _decrypt_signature
video_id, player_url, s
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 444, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 505, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 399, in _search_regex
raise RegexNotFoundError('Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract Initial JS player signature function name; 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.

[dstftw]

Post the full output you get when running with --verbose option

[Garionion]

youtube-dl --verbose https://www.youtube.com/watch?v=yXQViqx6GMY
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', 'https://www.youtube.com/watch?v=yXQViqx6GMY']
[debug] Encodings: locale ISO-8859-1, fs ISO-8859-1, out ISO-8859-1, pref ISO-8859-1
[debug] youtube-dl version 2014.09.12
[debug] Python version 2.7.3 - Linux-2.6.32-042stab094.7-x86_64-with-debian-7.7
[debug] Proxy map: {}
[youtube] Setting language
[youtube] Confirming age
[youtube] yXQViqx6GMY: Downloading webpage
[youtube] yXQViqx6GMY: Downloading video info webpage
[youtube] yXQViqx6GMY: Extracting video information
[youtube] yXQViqx6GMY: Encrypted signatures detected.
[youtube] {43} signature length 46.34.3, html5 player en_US-vflIlILAX
[youtube] yXQViqx6GMY: Downloading js player vflIlILAX
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 530, in _decrypt_signature
video_id, player_url, s
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 444, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 505, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 399, in _search_regex
raise RegexNotFoundError('Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract Initial JS player signature function name; 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/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 530, in _decrypt_signature
video_id, player_url, s
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 444, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 505, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 399, in _search_regex
raise RegexNotFoundError('Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract Initial JS player signature function name; 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/local/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 523, in extract_info
ie_result = ie.extract(url)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 178, in extract
return self._real_extract(url)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 915, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 540, in _decrypt_signature
u'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 530, in _decrypt_signature
video_id, player_url, s
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 444, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 505, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/local/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 399, in _search_regex
raise RegexNotFoundError('Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract Initial JS player signature function name; 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.

[clampak]

You're using an old version. Update and see if you still have the same problem.

[jaimeMF]

As @clampak said, you are using an outdated version. Please try with the last version (see our FAQ for the upgrade instructions).

If it still fails, post the verbose output and we will reopen the issue.