Componentvideo is supported on many TVs, DVD players, VCRs, DVR devices as well as many other video display devices. Composite video employs 3 cables that look and to degrees are similar to TV antenna cable. The general spec used in component video is called RG-6 and the component cable specification that most recommend comes from a cable type called Belden 1694A. The spec is described here
http://www.bluejeanscable.com/pages/technicaldocs/1694tech.htm There are many equivalents and near equivalents to Belden cable out there.
Over the weekend I removed the S video connectors we previously used and retro-fitted component cables in their place. The difference was AMAZING. From our DVD player, the color resolution and depth increased dramatically, the image clarity and brilliance improved with equal impressive gains. There was also a remarkable improvement in many of the color related subtleties. Even the comparatively crappy output from the VCR showed a
massive improvementt. My old, dark and often grainy Star Trek recordings looked far better than ever. I highly recommend to anyone that watches videos to make this change. If you are at all skilled with cable, you can buy the Belden 1694A cable for about $.4 per foot, and the connectors are about $4 a piece. Otherwise the pre-made cables are a little pricey, but not too bad, and mostly you won’t regret it for a second. Makes your current video stuff seem better than new!