I have personally litigated such cases, both as criminal defense counsel and once, after I got the guy off, won him a civil suit for money damages for false arrest and civil rights violation. That did involve an old high school grudge by the very young officer.
Again, I wasn’t there and have only seen a small video made of the middle of the interaction. I can’t decide anything on the basis of that, and your personal experience doesn’t tell me anything more about this particular incident.