Nowadays kids cannot do anything without it being caught on camera for all the world to see and judge. This could continue to haunt "the bully" for the rest of his life. Imagine his future kids stumbling across this.
He chose to be on camera smacking an innocent kid in the face; he doesn't deserve any sympathy as a result.
I hope it haunts him for at least the next few years, might force him to realise what a little prick he is and actually become a decent human being.