All of the different "theories" are divide and conquer. They perfected that technique with JFK. Argue endlessly about meaningless details while doing nothing about plainly obvious facts in your face.
Facts are: most of the videos are fake. Whoever faked the videos knows what really happened. Until they are arrested nothing else matters.
You as an individual can't. You need a working government with a real rule of law to do that. So you got to get to point A before point B.