A Mac User
Get Media Cleaner Pro and save then as MPEG-1 format otherwise known as mpg.
http://www.discreet.com/products/cleaner/cleaner6/
While MPEG-4 is a nice format it is not popular with the PC crowd and not very accepted. Also mpg seems to be smaller. You can use htaccess to protract them as well unlike Real Player or Windows Media Player formats.