How TVs work.
A signal is broadcasted over the air by a tower. Within that signal is audio and video data, which I suppose both must be joined together. Somehow, the TV knows how to interpret the signal and say here's the audio and here's the video; fine I can get that. But, somehow the signal also includes data that says, here's the top of the image, here's the bottom, here's the left, here's the right, and here's all of the colors in the picture. I don't know what's going on there and I've wondered how much data can be packed into a TV signal. This technology has been around for decades and I don't understand it. I don't even want to even think of how WiFi works.