I agree with most of the posters in that you are not anticipating the ball well and that will come from more match play. From what I saw:
1 - playing too conservatively in that you hit almost all of your shots to the middle of the court and your serves in the middle of the box. You're not applying any pressure to your opponent.
2- in relation to the above, you are opening up your shoulder on your slice backhand (hence the floating) and you are hitting too many forehands short, which allows him to attack.