I was surprised that he was allowed to play on, because it looked to me like a hyperextension. Made me wonder if the treating physios can or indeed should have access to the video footage when assessing the injury on the park. As you say, the adrenaline can mask the full impact, and the player might not always know what has actually happened, so being able to liaise with someone who has viewed/is viewing the footage may help them make a more accurate diagnosis and prevent the player continuing when doing so might aggravate the injury.