Lucky, you've got white shirt in that video, otherwise you would be completely invisible against that dark wall.
I think you should position camera a bit closer, or place it behind you on some pedestal or ( I use rubbish bin) something that will elevate the view and bring it closer in detail. One problem sometimes with wall is, it tends to rush your strokes. It's great for footwork workout but not super ideal for shot making. I sometimes hit the wall as well, when I have no partner,I get new balls that bounce well. That way I can stand a bit further away, taking medium pace balls, still hit them after one bounce but more importantly, it will give me extra time to prepare for the shot and get my feet right.