I have no doubt that this young thug, and his degenerate family, are all either lying or delusional about his behavior.
It is quite possible to present yourself as a threat that needs to be addressed, even from that distance and without words. Staring isn't the same thing as staring down. Clinched fists, and probably a puffed out chest, and many other such gestures directly aimed at the officers, do justify going to speak with the thug. Once that conversation starts or the officers approach him, it's a very short trip from there to pinning him like this if his non-cooperation was as aggressive up-close as it was from a distance.
I also do not doubt the officers likely made some mistakes, and are probably just like other cops and far too quick to use too much force.
But, given the choice, I'd take a world dominated by those officers than one dominated by those thugs any day of the week. This guy, and all his little thug friends, and all the broken families associated with them have probably made an entire section of his city unlivable for decent people. The officers are then the front line to bring some sort of order. I sympathize with all the cop-bashing here. Most of it is justified. But it also seems clear that you all don't have any idea how destructive people like this little thug are to society.