Those are composite cables(i believe that's what they are called), in otherwords it seperates the "image" up into the three colours that is natural to the tubes in tv's)obviously tube tv's, not LCD, etc). I believe you can by an adapter that switches them to yellow video and or s-video. Those cables should only give you picture and not sound. My DVD player has composite in as well as my tv.

"why I've gotta be one of the cool kids just to walk by/
- without being tripped, thrown down on the ground and kicked/
Insulting me for no reason, I was treated like shit/
The teachers let it happen/
I've even seen some of them teachers laughing/
That's why I had a smile on my face when I started blastin/" - Ill Bill - The Anatomy of a School Shooting