I've not watched the videos, but i've read the descriptions and it sounds both utterly horrific, and like the officers planned on at least beating the hell out of the guy pretty much for the sake of it (beating him/tazing him for not following an instruction that he'd already complied with)/under the flimsiest of excuses, and expected it to go the normal way of things and be swept under the carpet, but didn't stop the beating quite fast enough for that to be possible.
I think there's a case for their policing mentality breeding dehumanisation with the "criminal" public where by the "power" learned from unregulated violence leads to repetitions only until consequences become too great.
Similar to the way most domestic or animal abusers behave.
There is a lot of US police/law enforcement training material that is written/produced by unqualified people and is basically "see granny over there in a wheelchair, she'd got a knife" and "see the 5 year old with his action man, he's going to shank you" level*, and it's a major problem, same with a lot of nonsense science US police use in courts where one person with a pet theory convinced a few juries, then went on to train other officers and if they are questioned about the "science" they pull out the person who trained them (IIRC blood spatter is utterly tainted by this because so many of the "expert witnesses" regurgitate the stuff from one officer who had no scientific qualifications and reinforce each other).
Whilst the US courts have for years ignored blatant lying by officers and when people have tried to sue have made up out of whole cloth the "qualified immunity" excuse which is basically if the police officer hasn't been trained specifically that something is illegal in those exact circumstances they can't be held responsible for breaking the law (regardless of it what they're doing is something that any average 10 year old would know is illegal).
Some jurisdictions over there have been trying to clean up, but the police have been actively targeting the civilian oversight and even court staff, despite that there are instances where individual officers have got hundreds/thousands of cases that are being reviewed/reversed after systematic perjury/planting of evidence/corruption has been found after they've been too blatant on camera.
*I'm serious, that is a real training video sold to and used by various police forces back in the days of VHS in the US about risk assessment (IIRC basically baby's going to stick you with the knife disguised as a lollypop level of nuttery).
