Long ago I saw a video selector that had some four to six inputs and several outputs. Push buttons selected what went where. It was labeled "Video Selection Switch." All the connectors were F connectors.

This was not for video, but for RF. The idiots who made it didn't know that's not called video. This is very much like the dumb installer who doesn't know that some audio is analog and instead calls it "RCA."

At this moment, people here are talking about HDMI over one wire using a component cable wire.

People. Please. HDMI has, what, 19 connectors? And three pairs are for digital video? And there's digital communication between devices on other wires?

It is not possible to send HDMI over one wire. (First off, HDMI is not something that's sent over wires. It's the type of wires, connectors, all the signal details...it's a technology.) But it's completely possible to convert the high definition signal that is using HDMI for transmission, and change it to a single wire format which is called SDI.

Please stop calling it HDMI over one wire. Call it SDI. And if it isn't SDI, call it the other thing that it is. It's not HDMI.