I had started a long post, but thought I would go back and add this at the start. Are you wanting to get to the truth, or do you just want an excuse to beat up on the cops.
I understand lots of people hate cops just because they wear a badge, or from past experiences, or cause they worry about being caught smoking dope or diddling little boys... and if you fall into one of those categories, there is no real reason to read further.
Did you see the same video I did? The person being "hassled" said it was his wife going to the hospital, I think. [please correct me if that is wrong]
So, a cop sees an Ambulance speeding, but with no lights on. This might be an emergency, but it might be 2 guys with the munchies making a taco bell run. If they are not working, they have no more right to speed than you or I do. Cop hits the lights. What happened from there, who knows?
Maybe the guy in question (husband / driver / ? ) was aggressive? Was his actions BEFORE the incident on the side of the Ambulance shown somewhere, like the dash cams from the police cars? If so, where are they? Do they show what was said and done?
A few seconds of one side of the end of an argument doesn't present enough info to make a decision about the guilt or innocent of any of these people.
I don't know if this was bad cops or bad / mouthy perp. Neither do you, probably, at this point. I would like a little more info before someone suggests getting a rope.