Scott and I have been hunting around for a good youtube converter and found a lot that just simply don't work. Like videodownloader, vlix, flivix, etc. They all seem to have good intentions, but they lack on the follow through. We did find one that works and requires zero stuff to install. It's called vconvert. It's simple really...just pop in the youtube link into their site, pick your format, and boom, you gots the vid (or mp3 if that's your thing). In fact, it can even make ring tones.

Go forth and suck down
vconvert via lifehacker