12yr old pitching side view (updated video now public)

Hi everyone!

First time post. Looking for some feed back to help my son. We are trying to get some more MPH. Let me know if you see any adjustments that can be made. He has great location control. Any feed back would be welcomed!

Can’t see much in 5 seconds, his arm action looks inefficient but I would’t bet my last nickle on it…just too brief…also, traction is a huge deal…we will never see his true mechs if he doesn’t have a stable base, cleats or turf shoes, solid footing is an absolute necessity.