youtube-dl is a nice litte command line programm to download videos from youtube. One would naively think that it's some quirky wrapper around wget or such. But no, youtube-dl is actually very powerful.
To download a playlist and have the videos saved under a name that corresponds to the title of the video:
youtube-dl -o "%(title)s.%(ext)s" http://www.youtube.com/playlist?list=ABCDEFGH1234567890&feature=plcp
Thanks a lot to Ricardo Garcia and all the other contributors to that little nice tool.
Tomáš Pospíšek, 2012-05-24