Note that coverups are accomplished by covering up, that is by making sure accurate and relevant information is not available. So far, there are only a handful of items we can pull from this clip:

1. Corey's location. They will want to obscure or alter the exact locations of TMC, Trump, and Corey, because I suspect that if the truth were known, Corey is well out of line for a shooter that supposedly missed a head shot by a fraction of an inch.

2. Corey was close to the left edge. I suspect the shooter was behind the bunting of the left side, or he may have been at the extreme left edge inside the bleachers. There's no way yet of determining which. That brings up the next point.

3. Most of the blood is a few feet back from the left side. It would suggest Corey spotted the real shooter, the real shooter spotted him, he blew Corey's brains out, and Corey fell backwards, instantly brain dead (although technically still breathing). Because his body was completely limp, he got all tangled up in the bleachers.

4. When they carry Corey out, he just so happens to have a blood-soaked towel completely obscuring his entire head. Specifically, that's not a compress someone was trying to hold over his head wound. I propose that someone--the assassin himself for all we know--made sure that was draped over his head so no one can see the exact nature of his wounds as they would be inconsistent with the eventual "official narrative".

5. As far as this event being a fake, take a look at the black guy in the white button-down shirt near the end. That dude is completely in shock, freaked out, never saw anything like it before in his life, literally does not know what to do next.