Actually, I think he's playing up. The other guy on his team, #15, is Jarvis Thomas, a 2018 prospect in the Rivals 150. The first few clips, it looks like he's playing against guys about his size. There are some clips where he's going up against someone shorter and I wonder if that was just a mismatch on a switch defensively.
He has some work to do on his shot. I do not like the way his right, shooting hand crosses the center line of his body when he loads to shoot. He's basically shooting from his left eye, across his body, with his right elbow out and his right forearm up at about a 60* angle. Maybe even 45*. It works for Lonzo Ball but better mechanics will lead to better shooting for nearly everyone else.
I'd hope he could get some film of just him shooting from various angles so that he can see what he looks like. He still has time to fix it.