You see a tiny clip that matches your world view: police are bad. And instantly you no longer care about context. This is exactly how MAGA processes information.
Always demand the full picture. Never listen to only one side. And stay cricital of all evidence shown. That is hard, but at least stop downvoting and telling off people that point this out.
And I repeat: this still looks bad. Very much worth investigating what happened. Most likely this cop went out of line. But let's not play judge based on a couple of seconds of contextless video.