Slo mo, still the same thing.
Toss would land outside the baseline.
You finish your swing way too late, indicated by your super long followthru.
A swing has only so much forward movement. You need to finish the acceleration just as you hit the ball, meaning you need to start EARLIER.
You need that high hand, high elbow finish AFTER you hit the ball, with the racket facing the ground, not the opponent.
Yes, you are swinging faster.