In order to do video previews that are the best possible quality I have been using actual consoles for some of the more WIP (Emulation Wise) systems.
So far I have aquired:
Sega Dreamcast: Video Set 75% Complete
Panasonic FZ-1 3DO
DVS CDi
The only other system that I need for the project is a Sega Saturn, if anyone has one they could part with it will go to a great cause

I'm just hoping to find one that's not a rediculous price, since all it will be used for is making game videos.