18 Days: D-Terminal is a digital(?) connection that is not used in the US. I believe it can be adapted to VGA (HD-15; that is, what CRT computer monitors use) pretty easily. The "AV" (composite) video is the lowest common denominator for TV video signals; it just throws everything together into one RCA cable. S-Video is one connector with multiple wires at the end, which most TVs have inputs for. Component is the best analog video connector; it just separates the video signal into three separate RCA cables. Component is much better than the other two because it gives a better picture and can support HDTV signals. For the Wii, that means you can get 480p, so you have have 60 full frames per second instead of 60 fields (basically half-frames) per second (look up 480i on Wikipedia if you care).