You can send all kinds of fun stuff to a TV from an Arduino using the TVout Library. All you need is an RCA cable and two resistors (470 & 1k).
TV Ground to Arduino Ground
TV Signal to 470 to pin 7
TV Signal to 1k to pin 9
(Audio to pin 11)
Here is the one I built to experiment with:
It works! When I get another long RCA I’ll add audio support.
and you can do what with what!!!