This is a tough angle from which to critique. Your depth is variable.
1. Set the hooks one notch lower.
2. I think your stance is a bit wide, but can't be sure from this angle.
3. Read and apply Bill Hannon's advice in his thoracic extension article posted on this site.
4. Get tighter throughout your body.
5. Stop looking up.
6. Fix these as best you can and post a new video shot at hip height with the camera about 45 degrees behind you.
Where do you train?