I tried a couple of them and they are looking great, it loads fast for me

Hey, Jim, have you thought about changing these to flash previews? Flash offers nice high quality in a small video size, and for small clips like this you don't need any special server-side technology, just a copy of Flash Video MX (or another program) to convert it for you....btw, the Flash Video MX program also generates the html code for you too.

cheers,
Luke