I actually had to watch this video twice, I just couldn't believe it the first time. I've sent this to several OPOTA trainers to be used as a how "NOT TO" for their classes. That being said what your seeing here is a systemic problem, it's not just the officer! You also need to investigate the chain of command starting with his immediate supervisor. Officers don't get like this overnight, it happens slowly over time. A wink and a nod when there are a few too many bumps, or not correcting behavior when necessary leads to what we have here. I knew there were going to be problems when Ofc. "Knuckles" get's out of the car with gloves on. He's been doing this for way too long and getting away with it, he would try that on my side of town and get several senior officers riding him hard (and that's before the sergeant gets a shot at him.)
I think your going to find that you have several failures to supervise in the chain and/or no supervision at all, that's the only way I can see this happening. And the other officer is on the hook for not taking control of the situation and sending knuckles back to the car for a time out (And yes I've done this.) I just don't really have the time to go through this minute by minute, the IA package would make war and peace look like a dime store novel.
I need an aspirin ....