I wasn't going to reply on this post, but.... MORON.
If he was purely there to allow the other 2 bikes and ambulance onto the motorway, I would of let the ambulance go on first. People will (usually) always allow an ambulance through or stop to let them through.
If there's an accident, then put the bikes in a diagnal line accross the lane, BUT don't stay on it.
Too many "if's" about this video, but with what is shown, MORON.
Rob.