I don't really get what he is being asked to do in this 'vestibular theapy'. From what I can see in the video it looks like stuff that would make my brain melt (running around, catching a ball etc). Presumably this is only for when you've reached a certain level of recovery?

And he is mad for wanting to play again. After such bad pcs from two such seemingly innocuous concussions he's obviously very susceptible - and is being seriously misled by the professionals.