I am going to install my DVD playing head unit this weekend. I haven't bought the rear seat, headrest-mounted monitor to the monitor yet. I am thinking of running the video cable while I am routing the cables for the amp(s), so I don't have to take things apart again later. I need to get it locally since I'm running out of time. Is there a special type of video cable needed (like insulated RCA cables) so there isn't electrical insulation? What do you guys suggest I get (that is affordable)?