How To Download And Save Youtube Videos (UPDATED)
Tested 2 nov 2007 ------ Still Working
UPDATE 8/30/07: Youtube's latest upgrade broke the javimoya and other youtube video downloader solutions, but this firefox plugin still works on the new youtube, and is the best choice right now. If you don't use Firefox, uhhh, well you should really be using Firefox anyway, dude. Download it!
Add on site : https://addons.mozilla.org/en-US/firefox/addon/3006