A lot of the videos portray violent rioters/looters. A lot of the ones of the police are ambiguous because they don't show what behavior warranted the police reaction.
I've also seen a lot of videos of peaceful protests with police walking/talking/marching with the protesters.
We do justice a disservice when we lump everyone and every precinct together.
I've yet to see an instance of this that wasn't precipitated by cops showing up in ironman armor to a peaceful protest and firing on people with all sorts of military-police toys.
The violent instigators are the cops, across America. Even Target came out and said "whatever, our shit's insured, this problem with the cops needs to be solved."
Animals.