Exporting Youtube videos?

[yendi]

Okay, I know there are a zillion tools for pulling the audio content out of a Youtube video into an MP3 file. But are there any good, reliable tools for pulling down the audio and video? I've found some commercial ones, but I'm looking for a freebie, preferably web-based, although an app would do. I know that VLC is supposed to do it, but I can't get it to work for the life of me.

ETA: Format doesn't matter (although .flv or .avi are the ones I'd prefer).

(And yes, this is actually work-related. Long story.)