Can't get youtube -dl to work

[rtroxel2]

I downloaded the YouTube downloader youtube -dl, but when I typed the test command into my terminal, I received these errors:

roy@roy-EP45-UD3L:~$ youtube-dl https://www.youtube.com/watch?v=_iMmE8cwsvw
[youtube] Setting language
[youtube] _iMmE8cwsvw: Downloading video webpage
[youtube] _iMmE8cwsvw: Downloading video info webpage
[youtube] _iMmE8cwsvw: Extracting video information
Traceback (most recent call last):
File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/usr/bin/youtube-dl/__main__.py", line 7, in <module>
File "/usr/bin/youtube-dl/__init__.py", line 536, in main

File "/usr/bin/youtube-dl/__init__.py", line 520, in _real_main

File "/usr/bin/youtube-dl/FileDownloader.py", line 475, in download
File "/usr/bin/youtube-dl/InfoExtractors.py", line 80, in extract
File "/usr/bin/youtube-dl/InfoExtractors.py", line 405, in _real_extract
File "/usr/bin/youtube-dl/InfoExtractors.py", line 405, in <genexpr>
KeyError: 'sig'

Can anyone explain what I did wrong?

Thanks, in advance,

Roy

[mc4man]

Generally speaking support for youtube-dl & similar is not supported in this forum, see here
http://ubuntuforums.org/showthread.php?t=1850955