Woof. XD
Only done two lipsynch videos, and I have a major love-hate relationship with it. It looks gtrat, but it's a cast-iron bitch to do:
Blunder and Lightning -- First bash at lipsynching. If Luffy singing as Don Karnage isn't scary enough....
Evangelion: Better, Shorter, and Screwed Up -- Rekindled my love-hate thing, though after developing my "dummy track" method, it certainly went a little smoother. Kaworu gummed up the works a bit, though.