Ever wonder how they put that amazing magical yellow line on the line of scrimmage and at the first-down point on the college and NFL football games we watch on TV? It's a terrific technology and has in many ways made watching football very different since it was adopted several years ago.

Well, for those of use who have wondered exactly how they do it, here's a video via FANDOME that explains in some technical detail how the magic TV line on the football field works:

Very cool stuff.