If you need to send the signal a long distance try getting an A/V out cord (you could get one on ebay for a few bucks) almost every camcorder has an out for those, and then get an RF Modulator which takes the AV signal and turns it into an RF (coaxial signal). Coaxial Cable is really cheap and can go long distances then just put another RF Modulator on the other end (an old vcr can also double as an RF Modulator. We did a setup like this for our talent show so the performers in the
greenroom could see what was going on and it worked out great.