Same as with point to point antennas, video signals go in one direction instead of broadcasting 360 degrees, go to a multi-plexer, "decrypted" so to speak, finally to the video screen for viewing.
Orrrrrrrr, Orrrrrrr ; satellite TV broadcast. A fireld reporter in England transmitting a signal to the United States.
2-5 GHZ encryption. When I turn to dust, probably be 15-20 GHZ triple encryption.