Vintage Cable TV
Sure, I remember ON TV from back in the '70s. In fact, the antenna is still in the attic where it was originally installed.
My earliest memory of it was falling asleep watching "The Betsy" movie. Woke up a few minutes later, looked at the TV just as Kathleen Beller is walking out of the pool topless. THAT got me completely awake. Never seen that on regular TV before.
For you younger FABO members, see if you can google the scene. Young Ms. Beller was very easy to look at.