I watched John Carpenter’s In The Mouth of Madness for the 10th time. It, like They Live, is a documentary. It's about the controllers behind the controllers--- --and how they exert control over reality by controlling the minds via mediation, thus creating their reality.
It's about a Mind-Virus Pandemic that changes everyone's worldview. Like the radicalizing influence of a dark new bible, a series of books is used to warp reality through its experiencers.
It demonstrates a controlled media spreading fiction via media to recreate the world through the minds of those they influence.