Your back is rounded at the top before your start and you flex your spine about mid way through your ascent.
Widen your grip slightly and get your wrists straight. They are flexed right now, especially your right.
Get your chest up higher at the start. This will probably necessitate dropping your elbows. That's good because they are too high right now.
Get tight and do not allow yourself to relax, especially not on the ascent.
Look down. Don't look at yourself in the mirror.
Get deeper. You are just a little shy on some reps