There's a few formats you might want to consider: Quicktime 6 now offers mpg4 -- installing the pro version you will not see the mpg4 audio inside of VV3, but you will see the video codec. And winmedia & real both work. Personally I like winmedia, but I think it's a matter of preference -- in my opinion Real gives the center focus of your video more attention, with an almost blurred background, while winmedia can give you problems with background pixilation and/or crawl at lower, web bitrates. With any of these formats I think you might have to do some fine tuning if you're trying to match the quicktime animation compression -- maybe the winmedia screen capture compression will work for you.