What do you think he could do better in his forehand loop against backspin?
Only watched the first strokes. I think he has to much backswing, and that the stroke is to long. I want less backswing, with a more compact smaller stroke with faster acceleration with the forearm. You want to explode at the contact of the ball, especially against backspin. I also think he could use the forearm more, now it looks like he is almost pushing the ball forward. Not sure about the legs, he maybe could use them to help him a little more.
But he gets the ball over the net, so it is working but he is not getting much energy out from that stroke in my opinion. I think the biggest problem is the backswing and that he is not using the forearm enough.
But i am no expert, but as a coach i would try to correct the things i mentioned. Interested to hear what others think.