Originally Posted by NLBwell
Forehand - think back quicker, forward slower. If you get your racket back sooner, you can have a more gradual acceleration to the ball and less of a fast swat.
Backhand - get contact point consistently in front of you. Looks like it is often at your hip or even behind it.
Serve - Get elbow up more and racket head down more.
The basics of many of the comments on your video are above. Please keep these in mind.