Huge swf file

I have on my hard drive a TV commercial in the .swf format that I got off the internet. But it is huge in size... 35 mb. Similar commericals I've seen are around 2 to 3 mb's. I tried converting it to a .avi file and it went from 35 mb to 85 mb... accccccccck! It plays fine in either format but why it is so large. I don't see anything different about it from the other commericals. Does anybody know a way to convert this to reasonable file size without a major loss in quality.

Thanks,

Wendell

hi,

Try publishing it as Flash Video (either .swf or .flv).
Here there are some articles on Flash Video.