I believe what your friend is talking about us something called EME for earth-moon-earth, or "moonbounce" which is sometimes done by ham operators using the moon as simply a big dumb repeater, by firing signals off of it.

It's difficult to do, and even harder to do reliably. If you wanted to do it in a way that would be able to give a reliable steady picture you'd need very powerful equipment. And how would you hide the transmissions *from* earth? (as had been mentioned)

it would be difficult to do this without worrying about that. Simply "bouncing" the signals off would make them appear to come from the whole moon, not a single location. Variance in the shape of the moon could cause "ghosting" and other image problems.

In practice, I am not sure there are any examples of video being successfully transmitted by this method. Much less video which is proported to be genuine.

And then theres still that pesky problem of somehow sending high power signals to the moon without being noticed. You would probably need to send megawatts of power to get a decent video return.

When amateurs do it, they are limited to 1500 watts. With this, even with massive antenna arrays and a lot of effort, its tough to get an actual signal through. Just the carrier wave is considered a success