Listening to that video, there are two different sources of the gunfire. The “experts” are arguing that the different set of shots are just simply echoes from the hotel. But, those “echoes” don’t match the the shots coming from the hotel. Those high-pitched shots sound like a small caliber (like a 5.56) being fired in the direction of the camera. The individuals on the catwalk would qualify as a source. But, I don’t notice any muzzle flashes coming from them.
There is gunfire, there are echoes, and there are bullet impacts, and more echoes, all of which also make plenty of noise.
The tinfoil hat stuff is comical...