Error downloading from youtube

[dspstudio]

i receive some errors when downloading the video jiiFzKfuPMk (other videos i tried are working) here is the error:
youtube-dl -t --extract-audio --audio-format mp3 --audio-quality 256k --max-quality 37 http://www.youtube.com/watch?v=jiiFzKfuPMk
[youtube] Setting language
[youtube] jiiFzKfuPMk: Downloading video webpage
[youtube] jiiFzKfuPMk: Downloading video info webpage
[youtube] jiiFzKfuPMk: Extracting video information
Traceback (most recent call last):
File "/usr/bin/youtube-dl", line 4645, in
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
url_map = dict((ud['itag'][0], ud['url'][0] + '&signature=' + ud['sig'][0]) for ud in url_data)
KeyError: 'sig'

[jaimeMF]

You are running a (really) outdated version, run sudo youtube-dl -U to get the last version. See #897 for more info.