Unable to download a video... Please ignore, works with latest version.

[flajann2]

On Ubuntu 16.04, latest available from apt-get

youtube-dl https://youtu.be/FCWHoXMt3G4

Version 2016.02.22, but this is the latest available from the repo.

failed to work, resulting in the following:

[youtube] FCWHoXMt3G4: Downloading webpage
[youtube] FCWHoXMt3G4: Downloading video info webpage
[youtube] FCWHoXMt3G4: Extracting video information
[youtube] FCWHoXMt3G4: Downloading js player en_US-vflz_1lv2
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 905, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 820, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 883, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/usr/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 241, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'zt'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

And with the --verbose flag:

youtube-dl --verbose https://youtu.be/FCWHoXMt3G4
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'--verbose', u'https://youtu.be/FCWHoXMt3G4']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.02.22
[debug] Python version 2.7.12 - Linux-4.4.0-57-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: ffmpeg 2.8.10-0ubuntu0.16.04.1, ffprobe 2.8.10-0ubuntu0.16.04.1, rtmpdump 2.4
[debug] Proxy map: {}
[youtube] FCWHoXMt3G4: Downloading webpage
[youtube] FCWHoXMt3G4: Downloading video info webpage
[youtube] FCWHoXMt3G4: Extracting video information
[youtube] {43} signature length 45.42, html5 player en_US-vflz_1lv2
[youtube] FCWHoXMt3G4: Downloading player https://s.ytimg.com/yts/jsbin/player-en_US-vflz_1lv2/base.js
ERROR: Signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 905, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 820, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 883, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/usr/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 241, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'zt'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
(caused by ExtractorError(u"Could not find JS function u'zt'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.",)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 905, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 820, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 883, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/usr/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 241, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'zt'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 666, in extract_info
ie_result = ie.extract(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 316, in extract
return self._real_extract(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 1407, in _real_extract
encrypted_sig, video_id, player_url, age_gate)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 915, in _decrypt_signature
'Signature extraction failed: ' + tb, cause=e)
ExtractorError: Signature extraction failed: Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 905, in _decrypt_signature
video_id, player_url, s
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 820, in _extract_signature_function
res = self._parse_sig_js(code)
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 883, in _parse_sig_js
initial_function = jsi.extract_function(funcname)
File "/usr/lib/python2.7/dist-packages/youtube_dl/jsinterp.py", line 241, in extract_function
raise ExtractorError('Could not find JS function %r' % funcname)
ExtractorError: Could not find JS function u'zt'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
(caused by ExtractorError(u"Could not find JS function u'zt'; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.",)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

Please follow the guide below

• You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your issue (like that [x])
• Use Preview tab to see how your issue will actually look like

---

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.01.05. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2017.01.05

Before submitting an issue make sure you have:

• At least skimmed through README and most notably FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

---

The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

---

If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

$ youtube-dl -v <your command line>
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-v', u'http://www.youtube.com/watch?v=BaW_jenozKcj']
[debug] Encodings: locale cp1251, fs mbcs, out cp866, pref cp1251
[debug] youtube-dl version 2017.01.05
[debug] Python version 2.7.11 - Windows-2003Server-5.2.3790-SP2
[debug] exe versions: ffmpeg N-75573-g1d0487f, ffprobe N-75573-g1d0487f, rtmpdump 2.4
[debug] Proxy map: {}
...
<end of log>

---

If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

• Single video: https://www.youtube.com/watch?v=BaW_jenozKc
• Single video: https://youtu.be/BaW_jenozKc
• Playlist: https://www.youtube.com/playlist?list=PL4lCao7KL_QFVb7Iudeipvc2BCavECqzc

Note that youtube-dl does not support sites dedicated to copyright infringement. In order for site support request to be accepted all provided example URLs should not violate any copyrights.

---

Description of your issue, suggested solution and other information

Explanation of your issue in arbitrary form goes here. Please make sure the description is worded well enough to be understood. Provide as much context and examples as possible.
If work on your issue requires account credentials please provide them or explain how one can obtain them.

[dstftw]

You are using an outdated version of youtube-dl. Read this FAQ entry if you have troubles updating.

[kmestri99]

I have an issue while downloading videos using youtube-dl
kalpesh@dell-Vostro-1450:~$ youtube-dl -f 22 $ youtube-dl -v youtube-dl -f 22 https://www.youtube.com/watch?v=iLRZ9A26XMc
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-f', u'22', u'$', u'youtube-dl', u'-v', u'youtube-dl', u'-f', u'22', u'https://www.youtube.com/watch?v=iLRZ9A26XMc']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.04.26
[debug] Python version 2.7.12 - Linux-4.4.0-21-generic-x86_64-with-LinuxMint-18.1-serena

[debug] exe versions: ffmpeg 2.8.11-0ubuntu0.16.04.1, ffprobe 2.8.11-0ubuntu0.16.04.1
[debug] Proxy map: {}
ERROR: u'$' is not a valid URL. Set --default-search "ytsearch" (or run youtube-dl "ytsearch:$" ) to search YouTube
Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 760, in extract_info
ie_result = ie.extract(url)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 429, in extract
ie_result = self._real_extract(url)
File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 1804, in _real_extract
% (url, url), expected=True)
ExtractorError: u'$' is not a valid URL. Set --default-search "ytsearch" (or run youtube-dl "ytsearch:$" ) to search YouTube

kalpesh@dell-Vostro-1450:$ [debug] System config: []
[debug]: command not found
kalpesh@dell-Vostro-1450:$ [debug] User config: []
[debug]: command not found
kalpesh@dell-Vostro-1450:$ [debug] Custom config: []
[debug]: command not found
kalpesh@dell-Vostro-1450:$ [debug] Command-line args: [u'-v', u'youtube-dl', u'-f', u'22', u'https://www.youtube.com/watch?v=iLRZ9A26XMc']
[debug]: command not found
kalpesh@dell-Vostro-1450:$ [debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug]: command not found
kalpesh@dell-Vostro-1450:$ [debug] youtube-dl version 2017.04.26
[debug]: command not found
kalpesh@dell-Vostro-1450:$ [debug] Python version 2.7.12 - Linux-4.4.0-21-generic-x86_64-with-LinuxMint-18.1-serena
[debug]: command not found
kalpesh@dell-Vostro-1450:$ [debug] exe versions: ffmpeg 2.8.11-0ubuntu0.16.04.1, ffprobe 2.8.11-0ubuntu0.16.04.1
[debug]: command not found
kalpesh@dell-Vostro-1450:$ [debug] Proxy map: {}
[debug]: command not found
kalpesh@dell-Vostro-1450:$ ERROR: u'youtube-dl' is not a valid URL. Set --default-search "ytsearch" (or run youtube-dl "ytsearch:youtube-dl" ) to search YouTube
bash: syntax error near unexpected token (' kalpesh@dell-Vostro-1450:~$ Traceback (most recent call last): bash: syntax error near unexpected token most'
kalpesh@dell-Vostro-1450:$ File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 760, in extract_info
No command 'File' found, did you mean:
Command 'zile' from package 'zile' (universe)
Command 'file' from package 'file' (main)
Command 'vile' from package 'vile' (universe)
Command 'kile' from package 'kile' (universe)
File: command not found
kalpesh@dell-Vostro-1450:$ ie_result = ie.extract(url)
bash: syntax error near unexpected token (' kalpesh@dell-Vostro-1450:~$ File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 429, in extract No command 'File' found, did you mean: Command 'file' from package 'file' (main) Command 'vile' from package 'vile' (universe) Command 'kile' from package 'kile' (universe) Command 'zile' from package 'zile' (universe) File: command not found kalpesh@dell-Vostro-1450:~$ ie_result = self._real_extract(url) bash: syntax error near unexpected token ('
kalpesh@dell-Vostro-1450:$ File "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 1804, in _real_extract
No command 'File' found, did you mean:
Command 'kile' from package 'kile' (universe)
Command 'vile' from package 'vile' (universe)
Command 'file' from package 'file' (main)
Command 'zile' from package 'zile' (universe)
File: command not found
kalpesh@dell-Vostro-1450:$ % (url, url), expected=True)
bash: syntax error near unexpected token url,' kalpesh@dell-Vostro-1450:~$ ExtractorError: u'youtube-dl' is not a valid URL. Set --default-search "ytsearch" (or run youtube-dl "ytsearch:youtube-dl" ) to search YouTube bash: syntax error near unexpected token ('
kalpesh@dell-Vostro-1450:~$

[kmestri99]

kalpesh@dell-Vostro-1450:~$ youtube-dl --version
2017.04.26

please help me to fix this issue.

[yan12125]

@kmestri99 Please follow #12885