Youtube downloader

[dep0]

Hi, i want a program to download videos from youtube.
I tried to download some programs from ubuntu software center but i keep getting the message "would need the installation of packages from non-certified sources" and the details are
"aview libcrypt-ssleay-perl libfilter-perl libgtk2-gladexml-perl libhttp-server-simple-perl libio-socket-ssl-perl libnet-libidn-perl libnet-ssleay-perl libspiffy-perl libwww-mechanize-perl slimrat slimrat-nox tesseract-ocr tesseract-ocr-eng xclip"
Any information?

[howefield]

Any information?

Sure, have a read here..

http://ubuntuforums.org/showthread.php?t=1850955