Well, if you hook it up thru your dvd player like you said, then just make sure the video card has the A/V hookups. If you hook it up thru an RF modulator, see if the video card you are getting has S-Video (its round and kinda looks like a hook-up that goes to a mouse or keyboard) or if it has A/V, but overall, any video card will work if they have either S-Video or A/V connectors.