From the outside, I think Fox News was only able to do that because in US culture, TV and movies are more revered than anywhere else, and therefore people's opinions, when voiced on TV, are taken way more seriously than they should be.
It's hard to explain what I mean but it's a feeling of "if it's on TV, there must be something to it" which is very strong in US culture, and this enables the worst and most evil people to influence public opinion, even if they spew nothing but lies or phantasies.
As for movies, I am always totally in awe of how many movies a person in the US watches - going to the movies once or even twice a week is widespread, which is odd because most movies aren't worth watching. The rest of the days they watch even more movies and TV shows at home. I always wonder what they get from that.
Listening to Knowledge Fight (the Alex Jones analysis podcast), I learned that Jones frequently uses the plot of Hollywood movies as a source for his insane conspiracy theories about "the globalists". So it seems like he knows that many dumb Americans aren't able to differentiate between movies and reality, because they watch more movies than interact with people and matters IRL.
Don't get me wrong, I love movies and TV shows too, but nobody can tell me there's enough good ones out there to fill every damn evening of the week. I go to the cinema maybe once a year, and watch the odd TV shows maybe every 3-4 years (because I don't want to spend my time watching crap).