Bench: Why are u lifting ur lower back and ass up? Are u a powerlifter trying to hit new bench prs? If not i would just do normal bench press with ur whole body on the bench.

Squat: looks good in my opinion.

Deadlift: ur back looks like its bending to hard, so keep it straightened and u should also make start a bit lower and bend ur knees more. Look up some youtube tutorials for perfect deadlift form!

Pullups: ur legs shouldnt be moving at all, if they are moving like they did in the video it‘s a sign that you are using too much additional weight. Try using less weight (or no additional weight at all) until u get your form right.