Media technology has always had an outsized effect.
This is right out of the 1960's. Not exactly the dawn of television, more like about 7:30, 8:00 in the morning when you're finally really waking up:
>Propaganda is a subject of great concern in our society today, perhaps more so than in any other society in history. With the advent of television as a complement to the other communications media now available to us, the opportunities to use propaganda in disseminating information, expounding ideas, and offering opinions have increaseed considerably. And, unfortunately, it is far too often the case that propaganda is used to make us accept questionable points-of-view, to make us vote for men who may be unfit for public office, and to make us buy products which are useless and sometimes even dangerous. Therefore, propaganda, or the method of influencing people to believe certain ideas and to follow certain courses of action, is of special importance to each of us.
from https://propaganda.games/about
Of course back then almost nobody had even seen a color TV yet, and when color eventually became less rare they were really hypnotic like never before.
There's always these well-worn techniques:
https://propaganda.games/technique
This actually started as an academic game during the Cold War, by a TV actor who had first-hand knowledge from associates who were blacklisted a decade earlier as suspected communists, in what can only be seen as an exaggerated over-reaction to actual Communist propaganda itself.
https://www.bbc.com/news/entertainment-arts-20408094
For both communist and anti-communist propaganda, students were expected to be better off if they were more prepared to see through the BS.