That kid can now file charges against Captain Hero Manly Man, and they’ll stick because the assault and battery is on camera. The Right will have a field day with it and it’ll become a topic in the next election. This is how it goes.
The subtlety that will be lost is that we mustn’t have a society where self proclaimed tough guys go around deciding who’s guilty of what and apprehending them however they see fit. Put down the old west movies and step away from the VCR.