There is nothing in that. Really nothing. If the cops charge him, they have to charge the other guys, and they have to charge Johnno's wife for taking the phone. Best off just letting the whole thing go, as the footage is not "beyond reasonable doubt" stuff, and then it degenerates into he said/she said, and that won't sustain a conviction. Yes, he hit him, but if it was necessary to protect himself or his wife all is fine.
Johnno was at Gate 26 after one of our games last year, getting his pic snapped with anyone who asked. Lovely guy. There really are some dickheads around, but even so, I hope the teacher doesn't cop too much for his foolishness. Even teachers are human.