Hi Alex,
This is looking good, I would just focus mainly on having a solid base and making sure you keep your feet on the ground during the contact, this will mean you can use better weight transfer and be more efficient. You’ll also be able to keep your arm more relaxed. This shot has already improved a lot so keep up the good work though, much more rotation in the body and and snap in the elbow, I can also see you are getting more spin by focusing on the wrist, if you get a nice loose arm and relaxed grip this will continue improving I have no doubt!