Oh wow I never really thought about this, thanks!!Serve toss is pretty erratic. This is the foundation of your serve and needs to be more consistent.
Also, your tossing arm is falling after tossing, and is nearly horizontal when you start your swing. You're leaving a lot of power/spin on the table because of this. Compare to the great servers who have vertical arm:
I get the idea of moving forward and my left leg landing inside the line, but what’s the practicality of swinging my right leg back?Balance would be the big this I would work on. That is, moveing forward with better rotation to land with better balance (your leg is kicked out sideways and you are bent most the time).
Something like this (not a fan of the guy but this demonstrates the basic idea).
Bh slice needs work. Fh is too slappy. Movement and feet need to be lighter and quicker.
A few more relaxed groundies, forehand and backhand and a few bh slices