Youtube does have a lot of videos of cops behaving badly. There's also a lot of videos where the cop changes his attitude once he sees or is informed that the person has a dashcam. That "no seatbelt" ticket becomes a warning when he's told that it was always on and I have a dashcam that also records inside to prove it.

My dashcam has gotten me out of a few bad tickets. The judge was not happy to see my videos. In one case an officer in DC pulled me over for doing 110 mph in the HOV lane on my motorcycle. He was in an unmarked car with no radar. The video clearly showed me riding in traffic at the posted speed limit. The officer was berated by the judge.
A second encounter was on i66 outside DC. I was in the slow lane and a BMW flew past me and took the exit. On the other side of the overpass was a new officer with his sergeant. They pulled me over for doing 20 over the limit. I explained what happened and that I had a dashcam. I got him on video telling me he believed me but he had to write the ticket anyway because his sergeant was making him.
The judge was not happy with this reasoning and really laid into him.

Before the dashcam was popular I got so many tickets that I lost my license for a year. Luckily I was in the Army during this time. I was never speeding but I was young and in most cases I had a black friend in the car. When you grow up poor you see the police differently if they're taking your paychecks.

I don't support defunding the police and appreciate them. They have the only job that have people trying to kill them on a regular basis. They're true heroes in my book despite my interactions with the bad ones.

I support whatever it takes to get rid of the few bad eggs.