I would take my chances in a court of law. Battery is touching. Assault is the yelling. They are paired as Assault & Battery.
Assault is usually a physical contact. It can be classified as such if it “violates a persons personal space or is threatening”.
Like I said before he never got closer than a few feet, not sure that’s personal space and we couldn’t hear what he was yelling.
It COULD be assault if he was saying “YOU SUCK IM GOING TO RIP YOUR HEAD OFF YOUR SHOULDERS”
But what if he was yelling ‘YOU HIT THE WRONG NOTE THERE, HOW MANY TIMES SO I HAVE TO TELL YOU ITS A C NOTE”.
In the second case it’s clearly not a physical threat so not assault.