All the talk about 'disrespect' and 'what if it was your wife' and 'what if it was on a tube or in a nightclub' can be simply discounted.
This was not a woman out in public without recourse to defence if she felt she needed it, this is a professional police officer. She is wearing a night stick and she is carrying a pepper spray, and she has a colleague a few feet away.
Do you honestly think that if she thought this man was being the slightest bit threatening, she would not dealt with it herself, of asked her colleague to intervene?
I am not suggesting that she thought it was the best part of her shift, but her body language indicates that she does not feel threatened, or not in control of the situation.
This officer is probably experienced in all levels of misbehaviour, and is perfectly capable of assessing that this is a reveller who has probably had a bit too much to drink, and is getting a bit carried away, and showing off, and if he starts getting serious, he can be dealt with then, but while he is only joking around, she is willing to tolerate it.
Making an issue out of some misplaced horseplay is not the way the police react - they deal with the situations appropriately, and in this case, the man stopped and walked away laughing.
It is clear he meant no harm, and it is clear that the officer did not feel under threat, or that she needed to take any action.
It is several country miles away from sexual assault.