I often hear of US propaganda going through newspapers and Hollywood movies. From the outside, the effect is obvious. But internally, does anyone knows how it w

I often hear of US propaganda going through newspapers and Hollywood movies. From the outside, the effect is obvious. But internally, does anyone knows how it works? Does the CIA sponsor moviemakers if they show things this way or that way? Does someone blackmail journalists into following a line? Who decides what is the story to develop? What's in it for a journalist or a scenarist when they have to sway from depicting the situation neutrally and when they have to add a twist that may discredit them if discovered? Is it marketing which demonstrates that some topics are currently popular, therefore they all align on the same topic? Do they receive money from private interests who need to push war, do they receive blackmail, career advancement or are the journalists and scenarists simply endoctrined into those topics?