It'd make it much easyer to post videos.

Although, I can see threads being CPU-intensive if a lot of videos are posted.

Honestly, I don't want to see videos multiple times. Once is enough.

You only have to watch them once?

AFAIK, embeddable flash video usually requires you to click on something before it'll load/play. (This is true for youtube, which will be 90% of the flash vids posted)