Yeah, but what he does to the cameraman is something quite specific, he pulls his shoulders, especially the shoulder carrying the heavy camera, backwards and down while the guy is moving and does so too fast for the BBC cameraman to get his feet back under him.
In Judo competition, you only do a hip throw version, where contact is maintained and you can make sure they fall safely rather than splatting the back of their head into the ground hard, as is very likely if you do it the way Constable Savage is demonstrating above. In some kinds of Aikido and Ju-Jitsu you do learn a breakfall to deal with that throw, but it's an advanced breakfall. Doing that technique to a random citizen, one carrying a heavy camera which he may instinctively try to protect rather than using his arms to break his fall, especially when coming in from his blind side so that he's totally unaware, carries a high risk of smashing the back of his skull on the pavement. It's quite clearly a potentially lethal attack.
What I wonder is whether it was purely improvised or whether he's trained (as quite a few cops do) in Tomiki Aikido or something similar?