After watching this particular video—and making no other claims about any other situation—both the police officer and the driver of the car were total jerks.
Being a total jerk is probably not illegal for either party.
People may be jerks. Freedom to be a jerk is written in the first amendment. As long as they do not touch you it is a case of toughen up buttercup.
On the other hand abuse of power which is what the police officer did is not equivalent.
He knew he was abusing his power and did it anyway because his little snowflake feefee were just so hurt.
Not acceptable. The proper remedy would be to have police office fired and never ever placed in a position where they have authority again. He does not have the temperament for it.
I have begun to advocate for insensitivity training for civil servants, they must chant at least three times a day, "Sticks and stones may break my bones but words (and hand gestures) will never hurt me".
Because what the police can do to you pales beside what can happen if you get cross ways of a CPS nitwit.