My Zenith DVD/CD/FM/AM Theatre system has a single "monitor out" yellow jack on the back. I'm not sure what this is exactly for. There are also 2 video in and video out (composite) auxillary jacks. Why would you run video through a the dvd player? I don't understand. If you have a video source why not wire it straight to the display. Why go through the dvd? And no I'm not talking about the video that comes from the DVD. I'm talking about some external video source being routed through the dvd player. Any light shed on this issue would be appreciated.