So you don't have to use any extra equipment - you just load the video into these units and play?
If that is correct they are even better!! What kind of format can they play?

I made the videos by filming the PC-screen with my videocamera, zooming in on a flight sim called
A10 Lock On, the other one (flying over San Francisco) I made by filming the screen while scrolling
Google Earth, then I edited it in Sony Vegas and put the symbols on top of the video.