You are athletic and fit, have great movement.
Try to stay grounded on at least half your groundstrokes...not every groundie, but at least the one's in your strikezone. You jump on every ball, and when you get tired, you will spray balls everywhere with mishits.
The problem with your serve is that you never achieve a trophy position. Your right hand is low to start, OK. But you raise it straight up to your right ear...WAAAAY too high.... and don't loop the backswing correctly, insteady, you push the racket thru to your forward slap at the ball.
LOWER your right arm at trophy. Or, DO NOT raise your right arm after your prep position. With your high right arm, you don't hit upwards or swing upwards at the ball, and instead just slap at the ball.