I've seen like a bunch of people have video clips as their avatars and stuff...some people even embed them to banners and whatnot. I've been trying for like two days now to find a site that has 'em but I can't seem to find any. Can anybody help me? You know, like those family guy clips that some peeps have...where are they?

umm
i suppose you can watch a clip at adultswim.com
and screencapture some scenes and use a gif animator to create the animation.

other than that, i don't really know.
ask the people with the clips/videos/avatars