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shane@GIT:~$ sudo youtube-dl -v http://www.youtube.com/watch?v=I7HahVwYpwo
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-v', 'http://www.youtube.com/watch?v=I7HahVwYpwo']
[debug] youtube-dl version 2013.07.31
[debug] Python version 2.7.3 - Linux-3.5.0-37-generic-x86_64-with-Ubuntu-12.04-precise
[debug] Proxy map: {}
[youtube] Setting language
[youtube] I7HahVwYpwo: Downloading video webpage
[youtube] I7HahVwYpwo: Downloading video info webpage
[youtube] I7HahVwYpwo: Extracting video information
[youtube] I7HahVwYpwo: Encrypted signatures detected.
[youtube] encrypted signature length 83 (40.42), itag 44, html5 player vflTWC9KW
[youtube] encrypted signature length 83 (40.42), itag 35, html5 player vflTWC9KW
[youtube] encrypted signature length 83 (40.42), itag 43, html5 player vflTWC9KW
[youtube] encrypted signature length 83 (40.42), itag 34, html5 player vflTWC9KW
[youtube] encrypted signature length 83 (40.42), itag 18, html5 player vflTWC9KW
[youtube] encrypted signature length 83 (40.42), itag 5, html5 player vflTWC9KW
[youtube] encrypted signature length 83 (40.42), itag 36, html5 player vflTWC9KW
[youtube] encrypted signature length 83 (40.42), itag 17, html5 player vflTWC9KW
ERROR: unable to download video
Traceback (most recent call last):
File "/usr/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 573, in download
videos = self.extract_info(url)
File "/usr/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 327, in extract_info
return self.process_ie_result(ie_result, download=download)
File "/usr/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 410, in process_ie_result
for r in ie_result['entries']
File "/usr/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 357, in process_ie_result
self.process_info(ie_result)
File "/usr/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 550, in process_info
raise UnavailableVideoError()
UnavailableVideoError