What we would need to comment is to know what shot situation, what ball, and what what/result he is looking for. Without that, we are giving over-generalized advice that may or may not be very applicable to what he is trying to do.
There are also a lot of other things that go into a shot like the step to position, the crouch, the toes, how the sequence of explosions are done, the grip, the whip, the final arm/wrist and grip.
The few reps shown here make it look like there is a slower very low spin practice ball coming and the OP wants to make a safe somewhat spinny shot with low to low medium power. Kinda like a 30% of possible power and making a little more spin than speed.
If OP wants more power and spin on this kind of ball, he could just more whip and grip. Even from this position where the ball is in descent. Training like that can really help for when in a match, you cannot get to the ball at the top and you still need to make an aggressive shot with acceptable safety. Ideally, one would move to a little more forward position and use a more forward stroke vs this kind of ball - many advantages to doing it that way...
... but we need to understand again all the things about what ball is coming where and what we want to do to it - that will drive the response and there is more than one effective response that can be done under pressure.
We could talk all night about all the different things to do to hit differnt balls to get such and such result.
What a coach would look for are more along the lines of:
Did player see what was going on with the ball and know where/when/what spin/speed/vector at the right center of impact zone point?
HOW EFFECTIVE did the player move to a good position ready on balance in rhythm
Did player select an appropriate shot for what he saw and wanted to do now and next ball?
Did player control the strike zone on balance with his impact?
Did player use an effective sequence of explosions?
Was player's stance and balance effective enough to do that shot?
Did it allow player to recover on balance ready to move?
Those are a good chunk of the kind of things to look at that will more readily apply to shot than just looking at a single shot in an obvious practice situation.