Videodrome (1983) Film

It's not quite dystopian, but it's an early look on how TV/media can fully control a person and was designed that way by nefarious people.
Starring James Woods and a cameo from Debbie Harry, it's another fucked up film from the mind of David Cronenberg.

⁣Max Renn is the President of Channel 83 Civic-TV, a small
television station on the UHF dial. He defends his programming of
largely X-rated shows - which depict graphic sex and extreme violence -
as a pure matter of economic survival as a small station. Behind closed
doors in specific company, he would admit that he enjoys such
programming, but as President will stay away from associated activities
that may be dangerous for him in its purchase. His current girlfriend,
radio personality Nicki Brand, who he met on a television talk show, is
sexually aroused by light mutilation on her person, that despite or
because her radio show is like an open air crisis hotline. On that same
talk show, the other guest via video feed was Professor Brian O'Blivion -
solely his stage name - who believes that television and video
broadcasts will one day overtake the world as reality, which may make
Max's programming in combination more dangerous. In Max's search for the
next big thing in like programming...