I was surprised by the direction of approach.. I'd have though coming from the stern of the dinghy was a safer route of approach. If they decided they were happy with the person in the water they could have looped a rope round the shroud and pulled the boat clear. If anything went wrong they drift safely.
They way they approached if the engine died the were gonna be ontop of the guy in the water.
If it really was necessary to approach from that direction, they should have gone in bow first to keep the prop away from the swimmer...
Other choice, if they didn't want to be stern to the waves, would have been to anchor the boat and use the anchor warp to ease themselves back pick up swimmer and the tow and then motor forward taking in anchor warp and then go from there...
Perhaps its all cemera angles and we can't see what else was going on nearby. Clearly a second boat over.