Definitely seen excessive use of force against seemingly peaceful protesters, but context is everything, and a 10 second snippet does not tell the full story of the interactions between that protester and that cop for the 45 minutes leading up to those 10 seconds.
I tend to reserve my judgement on those types of videos, since cops have been also taking a beating in the last few days with bricks, rocks, water bottles, etc... thrown at them off camera or before those clips start, where the convenient "editing" is done to portray the cops as the "bad guys" when often they have spent the last hour being insulted, assaulted and injured before they decide to move in with force on that "peaceful" protester...
It's a case of officers committing perjury as to the events that occurred to figuratively put a weapon into the scene.
The DAs slides https://twitter.com/wsbtv/status/1267843835889156097/photo/1