On my 12.04 LTS I can't download from YouTube via youtube-dl. I used to do that, but recently (for a week) I'm not able. I tried on many videos and I get same output:
$ youtube-dl -t http://www.youtube.com/watch?v=Sh0ciyuXbJA
[youtube] Setting language
[youtube] Sh0ciyuXbJA: Downloading video webpage
[youtube] Sh0ciyuXbJA: Downloading video info webpage
[youtube] Sh0ciyuXbJA: Extracting video information
Traceback (most recent call last):
File "/usr/bin/youtube-dl", line 4645, in <module>
main()
File "/usr/bin/youtube-dl", line 4636, in main
_real_main()
File "/usr/bin/youtube-dl", line 4620, in _real_main
retcode = fd.download(all_urls)
File "/usr/bin/youtube-dl", line 869, in download
ie.extract(url)
File "/usr/bin/youtube-dl", line 1135, in extract
return self._real_extract(url)
File "/usr/bin/youtube-dl", line 1406, in _real_extract
url_map = dict((ud['itag'][0], ud['url'][0] + '&signature=' + ud['sig'][0]) for ud in url_data)
File "/usr/bin/youtube-dl", line 1406, in <genexpr>
url_map = dict((ud['itag'][0], ud['url'][0] + '&signature=' + ud['sig'][0]) for ud in url_data)
KeyError: 'sig'
It seems it's some signature problem. I still can download videos via vlc. But I like youtube-dl – its faster.
I did already:
sudo apt-get --purge remove youtube-dl
sudo apt-get install youtube-dl
sudo youtube-dl --update
…but it didn't help.
Best Answer
Youtube updates his anti-download security system quite offen. You should keep your
youtube-dl
up-to-date. The version Ubuntu 12.04 Precis installs by default is 2012.02.27 (two years old).You can subscribe to the WebUpd8 PPA to get new releases when they're out (that is once or twice a week) :
You'll also find the .deb package of the latest youtube-dl release on that PPA (here and search for youtube-dl). Install it with a GUI-tool like
gdebi
or Ubuntu Software Center, or with these command lines :