ERROR: unable to download video

[0xAnime]

Command line output:

cat@cat-Dell-System-Vostro-3450:~$ youtube-dl --verbose -f 18 "https://www.youtube.com/watch?v=_hOm4yDo0-8"
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', '-f', '18', 'https://www.youtube.com/watch?v=_hOm4yDo0-8']
[debug] youtube-dl version 2013.08.29
[debug] Python version 2.7.5+ - Linux-3.11.0-20-generic-x86_64-with-Ubuntu-13.10-saucy
[debug] Proxy map: {}
[youtube] Setting language
[youtube] _hOm4yDo0-8: Downloading video webpage
[youtube] _hOm4yDo0-8: Downloading video info webpage
[youtube] _hOm4yDo0-8: Extracting video information
[youtube] _hOm4yDo0-8: Encrypted signatures detected.
[youtube] encrypted signature length 83 (40.42), itag 22, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 43, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 18, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 5, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 36, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 17, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 136, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 247, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 135, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 244, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 134, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 243, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 133, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 242, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 160, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 140, html5 player en_US-vflimfEzR
[youtube] encrypted signature length 83 (40.42), itag 171, html5 player en_US-vflimfEzR
ERROR: unable to download video
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 573, in download
videos = self.extract_info(url)
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 339, in extract_info
return self.process_ie_result(ie_result, download=download)
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 422, in process_ie_result
for r in ie_result['entries']
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 369, in process_ie_result
self.process_info(ie_result)
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 550, in process_info
raise UnavailableVideoError(err)
UnavailableVideoError: HTTP Error 403: Forbidden

cat@cat-Dell-System-Vostro-3450:$ youtube-dl --version
2013.08.29
cat@cat-Dell-System-Vostro-3450:$ python --version
Python 2.7.5+
cat@cat-Dell-System-Vostro-3450:~$

[jaimeMF]

You are running a (quite) outdated version, run sudo youtube-dl -U to upgrade. If you can reproduce the problem with the last version, please post the output with the --verbose option and we will reopen the issue.