Looks quite good and side view video would be more informative. To improve even more I would drop your hip few inches. Then your back would be less horizontal.
To try this at first bend your knees more. Then follow instructions from soda's thread. And after this try to imitate his fixed form.
You are big guy and you might benefit from bit wider stance to get room for your belly. At least worth to try.
I don't see any problematic shoulder work.