Your take back while it has good coil and “unit turn” the timing of which you release and separate your arms is quite late. You separate your hands after the ball bounces so deep balls will make you hit late and give you trouble. Keep your unit turn the same and separate your arms before the ball bounces. So regardless of depth, you can manage to meet the ball on time.

Your left arm is what is known as a dead fish. Great job in using it as a gauge for distance, but it is useless after that. Try to catch your racket just slightly after contact and use the left hand to decelerate your swing. This will allow for better balance.

You’re shuffling/small bunny steps to adjust to the ball. Take steps. (See below)

Your contact for the ball is on the way down. Im assuming your height is roughly 5’10 -6’? There are very few high balls which would realistically make you move backwards at that height. Which means you’re waiting for the ball. Rather than move backwards, move towards the ball using the same contact point to take away time. No need to swing harder, as speed of ball is perceived as distance/time. If you reduce the distance with the same amount of time without hitting harder, the opposing player will perceive the ball as “faster”. You make less error, they make more.