Saw the video. Said at the time that the "Big Man" was clearly an aggressive prick who thought he'd show off. Yeah the kid was annoying and being an arse, but it was disproportionate... he wasn't actually harming anyone.
The big fat oaf isn't "a hero" - I've seen his type a thousand times. A meat-headed **** wanting to prove what a "Big Man" he is.
That said, I'm not saying he deserved "charged", I think the police being involved at all sort of shows that this has gone too far... I assume they got involved because of the video, and not because the kid involved actually reported him, which in my view means they should keep out of it. If the "victim" has no complaint, then there shouldn't be a charge.
What I do think the Big Man deserved... is to try to show off with the wrong person, and get his nose broken for his trouble.