It wasn't like it was a sustained assault or something. It was done and over in 3 seconds. Yes, the guy should be punished. Not sure how much. He was acting like a jack booted thug, but I don't know if I would class it as assault.
Do you consider that assault and battery? Looked like he just grabbed her phone and slammed it on the ground. It was not acceptable what he did. I guess the question would be if a person did that to a stranger on the sidewalk, would they be charged with assault or just destruction of property? The phone is worth a few hundred?
I am glad it was caught on video. I thought the lady was too close at first, but she appeared to be backing off when asked to. I wouldn't call it assault, but it was bad.