Yeah, I know that really narrows it down.
I think I saw it either on /wsg/ or it got linked as a yt link either on /k/ or /pol/. Basically, it's a handheld camera following these plainclothes police guys at night as they're clearing out some looters. They're on foot for most of the video and don't have much gear on them aside from a couple wearing those armbands like in picrel. They go at some guys looting a jewelry store or something like that and one of the cops trips a looter as he's jumping out of the display window and the guys faceplants into the fender of a parked car. Then they beat the dogshit out of them all with collapsible batons. This is definitely pre-2020 and most likely before the Yellow Vest stuff. If I had to guess, it's the regularly schedules post-football chimpout. If I had it saved, I most definitely lost track of it and I haven't been able to find it online since then. Hope any of the stuff I've described rings a bell for someone.