RegexNotFoundError: Unable to extract Initial JS player signature function name

[mothlight]

youtube-dl -t https://www.youtube.com/watch?v=jYeDY6YkzIg
[youtube] Setting language
[youtube] jYeDY6YkzIg: Downloading webpage
[youtube] jYeDY6YkzIg: Downloading video info webpage
[youtube] jYeDY6YkzIg: Extracting video information
[youtube] jYeDY6YkzIg: Encrypted signatures detected.
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
[youtube] jYeDY6YkzIg: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/bin/youtube-dl/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/bin/youtube-dl/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'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.

WARNING: Warning: Falling back to static signature algorithm
ERROR: unable to download video data: HTTP Error 403: Forbidden

[qworty]

Yes I have this too on this video http://youtu.be/6teOmBuMxw4
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-t', 'http://youtu.be/6teOmBuMxw4', '--verbose']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2014.06.09
[debug] Python version 3.4.1 - Linux-3.14.6-1-ARCH-x86_64-with-arch
[debug] Proxy map: {}
[youtube] Setting language
[youtube] 6teOmBuMxw4: Downloading webpage
[youtube] 6teOmBuMxw4: Downloading video info webpage
[youtube] 6teOmBuMxw4: Extracting video information
[youtube] 6teOmBuMxw4: Encrypted signatures detected.
[youtube] encrypted signature length 82 (41.40), itag 22, html5 player en_US-vflazPBMd
[youtube] 6teOmBuMxw4: Downloading js player vflazPBMd
WARNING: Automatic signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 874, in _decrypt_signature
video_id, player_url, len(s)
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 376, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/youtube.py", line 444, in _parse_sig_js
u'Initial JS player signature function name')
File "/usr/lib/python3.4/site-packages/youtube_dl/extractor/common.py", line 383, in _search_regex
raise RegexNotFoundError(u'Unable to extract %s' % _name)
youtube_dl.utils.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.

[jaimeMF]

Duplicate of #3104, run sudo youtube-dl -U to upgrade.

@mothlight When reporting an issue, please post the full output you get when using the --verbose option (in this case youtube-dl -t https://www.youtube.com/watch?v=jYeDY6YkzIg), it provides us really useful information.