Best site for Previews/Trailers?

I’d like to create a disk of movie trailers / previews so the wife could watch them and decide what she wanted to see from that. (She’s not much up on reading critics reviews.)

Media player classic would be the best format for me, and if not that, some site that offered older quicktime compatible previews or even macromedia flash. I’m avoiding real player because that would be one too many for me (and other reasons).

I can do Streambox if my only option is to capture a stream.

Any suggestions on best ways (favorite software) to convert files to something a standard DVD player could understand also appreciated.