I have made playlists using KeepVid to rip YouTube videos in the past which bas worked pretty well. Then Ping came along which let me share those playlists, but nobody really gave a shit, or got how it worked. Now there is this cool web app, TubeLoop, which lets you make a playlist of YouTube...

Lovely showcase of our solar system, plugged into a synthesiser type thing. Amazing what the universe sounds like – surprisingly good! Check it all out...