7:00 to 7:02 Now that our actors know Tarrant is in the room, he quickly turns back to them to catch them on video diving to the floor. This is to show us that they're real people, at least for now.
7:02 to 7:08 A man in khaki pants tries to run by Tarrant but Tarrant apparently kills him and the man falls to the floor. Note that he also has no visible injuries. The man can be seen as Tarrant walks back down the hall. The man is lying in a position with his left leg much more forward than his right leg.
7:19 to 7:30 As Tarrant reenters the large room and continues shooting, the only movement is from two people jumping out of the left side of the room. Nobody is screaming, rolling around in pain, helping others, etc.
7:33 As Tarrant passes the dead man in the hallway in the khaki pants that we saw at 7:02 to 7:08 we can see that the man in khaki pants has moved his right leg so it's directly above his left leg. This is either a new take of this scene or he is making himself more comfortable as the rest of the scene plays out.
7:36 to 7:50 Tarrant again enters the large room and continues shooting. The few actors that were initially in this room have now left. All that remains are mass casualty dummies. Screams from some of the wounded can be heard somewhere. However, it's impossible to determine from where the screams are coming from and none of the injured move whatsoever. If Tarrant heard such screams he likely would have approached the injured to finished them off, like he later does with the girl outside. Thus, I again suspect we are hearing an audio recording edited into this video.
8:00 This time Tarrant reloads in the large room. It's the first time he hasn't reloaded in the hallway. This is a clear sign to us that all of the crisis actors are out of this room. Now, Tarrant will use real bullets. I suspect that when Tarrant inexplicably reloaded in the hallway that it was cover to make edits to the video and to allow the movement in and out of the large room of crisis actors and mass casualty dummies.
8:16 to 8:26 Now that Tarrant has reloaded and is using real bullets, he approaches the "victims" and fires at close range. Now we can see the bullets entering the victims. Although, look close, these are all mass casualty dummies. Remember, mass casualty dummies have been used in at least these events: 1) LAX shooting, 2)Orlando Pulse shooting and 3) Las Vegas concert shooting. This would not be a new trick.
8:32 Tarrant picks up a magazine for his gun from the floor in the hallway. This is the magazine that was already there before Tarrant entered the building that we saw at 6:52 to 6:53. It was mistakenly left there from a prior scene.
8:38 Our man in khaki pants is now fully stretched out and getting comfortable. If he was still alive, Tarrant would have killed him.The man in khaki pants in not good at repeating his exact position from scene to scene.
8:42 The gray shirted man in the doorway from 6:50 has now been dead for 1:52. Although his body is in the exact same position and nearly the same location, we can see that somebody moved the door so that it is now up against his body. Everybody from this room ran away from this doorway. Thus, it's unlikely that somebody ran through this doorway AND moved this door when it was already fully open. Most likely, this was some sort of minor mistake made between scenes.
8:44 As Tarrant leaves the mosque, there are now two bodies laying in the doorway. One is one of the men who has been there from the start. It is unclear where the other man came from as none were seen running out this door. The new body is laying in a pool of blood but curiously, the man who has been there for over two minutes shows no loss of blood. The man who has been there the longest now has his left hand, that was well above his head 6:44, well planted in between the new man's genital area. How does that happen exactly?
8:56 to 9:05 This is the first time that Tarrant shoots outside of the mosque courtyard. Note that the casings from his gun look like they disappear in mid air.
9:08 to 9:09 Tarrant fires three more shots and these shots DEFINITELY DISAPPEAR IN MID AIR. If the shots at 8:56 to 9:05 didn't convince you, these definitely should. This is concrete proof that this video wasn't a live feed and has been edited. I think the producers didn't want this drill to take place with witnesses reporting a live shooting out on the streets and somebody possibly killing actor Tarrant "to stop him". Thus, all shots fired outside of the controlled courtyard were digitally edited in later on.