downloader of videos from YouTube and other sites

 youtube-dl is a small command-line program to download videos from
 YouTube.com and other sites that don't provide direct links to the
 videos served.
 .
 youtube-dl allows the user, among other things, to choose a specific video
 quality to download (if available) or let the program automatically
 determine the best (or worst) quality video to grab. It supports
 downloading entire playlists and all videos from a given user.
 .
 Currently supported sites are: CollegeHumor, Comedy Central, Dailymotion,
 Facebook, Metacafe, MyVideo, Photobucket, The Escapist, Vimeo, Yahoo!,
 YouTube, blip.tv, depositfiles.com, video.google.com, xvideos, Soundcloud,
 InfoQ, Mixcloud, OpenClassRoom.