TubeLoop

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 videos, and then share that playlist on Facebook.

Have a play, its a pretty good experience, and feels much punchier sharing the list on Facebook as apposed to Ping.

Thanks to @rubbishcorp for another gem.