I think there’s a girl involved in this.....take a look at the shooter and on the immediate left yousee a girl standing in grey sweater....now go to the video and watch her reaction as she climbs over seats crying out no no no.....
She may have known the shooter. She seems more concerned about him laying shot on the ground than the other two men that he shot.
Exciting/hysteria about seeing a shooting is one thing, she doesn’t step out to safety, she runs around a bit and stays in the room to observe.
Maybe she is concerned about one or both of the men he shot. Almost sounds to me though like she’s screaming ‘let him go!”
And she moves around a bit not just staying at that back row.
I think that girl is the usher’s daughter. I think she’s saying, “Daddy, nooooo!” If so, she just saw her dad get shot.