yaydl (yet another youtube downloader) is a
commandline-oriented tool
that allows you to download videos from video
sharing Web sites
(currently YouTube, Myvideo, Dailymotion,
Clipfish, video.google, Metacafe, Sevenload, and Vimeo). The use of external
programs like mplayer or
ffmpeg enables it to re-encode the videos or to
rip the audio off a video.