And there were music TV programmes before MTV. What changed the game was the concept of a Music Video.
Read the book or the history of media about the impact of that moment.
MTV also did not come up with the concept of a music video, in fact they were about a half decade late to that particular party. You are making a bunch of unqualified statements that are incorrect and then you tell others to read books?
https://en.wikipedia.org/wiki/The_Jackson_5
He was 6 at the time.
MTV started almost two decades later.