I've seen cell phone video capture what looks like a round bullet in flight at the range. I suspect it is actually sunlight reflecting off the bullet and not the bullet itself otherwise it would look like a long rod.
There is muzzle flash in the window above the "A" on the canopy and also reflected on a cellphone screen of the guy in the white shirt. You can see the head swell upon entry, the exit wound and the hole through the collar. Slow it down and look...
He was shot from behind above his right ear at a fairly steep angle. The bullet exited left neck and through the collar of his shirt. It seems like it is common to think the exit wound is the entrance wound for some reason.
The brain trust supporting most of the listed chaotic actions could be framed in a less PC way than "leftist"... but Prager isn't going to slouch in that direction. Probably more inclined to obfuscate that very thing.