Can ethernet cable be used for composite audio/video?

Hi,
If I cut open an ethernet cable and use 3 of its inner strands and connect them on each side to RGB composite connectors, will I expect a signal to be successfully transferred through it?

I have loads of long ethernet cable, and there's a TV in the kitchen that I want to connect to my living room DVR. So if I could cut and solder ethernet cable to composite ends, that would save me a costly trip to the electronics store.

Thanks!
Mark