It depends on which version of the video you watch. For instance, CNNs version is very clear, but they have edited out some of the more damning evidence. In other clips you can see his body move as if he was hit in the stomach- looked like a sucker punch to me. Several times they slammed their knees into his back/butt and legs. At one point he is sitting against the poll and can't even hold his head up. They are holding his arms on either side, twisting them at the wrist. One confusing scene was when they were trying to force him to walk. His legs were like jelly, but someone was hammering on his forearm until he fell.
He was providing NO resistence at all. The restraint appear to be unnecessary to me. I had the impression that they were attempting to force him to say something or apologize before they would let him go, but who knows. What was obvious, is that he wasn't resisting them, except perhaps verbally.
