He may have been shot, notice what apears to be a subequent tracer round coming from right to left. It was not likely a head shot, his head did not snap back or to the side. If he was shot, it was to the body, most likely the chest area.
The tracer round makes it appear to be a shooter off screen right
Whatever the yellow "tracer" was, it coincided with a launch of a tear gas canister, and was far too slow to have been a gunshot. I suspect a fragment of the tear gas canister.