I can't change the name to the mentioned because who in the world would would know Siva. It is a kind of marketing gimmick on which the world runs.
This is actually the only thing I was responding to. The serves are really excellent serves. You have a real skill in serving, particularly for your level. But, what you are does not seem to have much similarity to what Jun Mizutani is doing to me apart from the fact that you are moving your racket forward and back before taking the actual stroke the way JM does; so it seems like the title is a marketing ploy. Not an actual thing. The serves are great. Perhaps you are trying to serve like Jun Mizutani. But the end result is that it is a Siva Schopenhauer serve.
BTW: in the JM video you just posted, JM starts bent at the waist with his hips and torso facing back, away from the table, and when he is done with his serve his hips are facing a little forward like he is ready for the serve to come back. The bend in JM's waist causes his spine to be angled at about 45-degrees angle the ground. When JM contacts the ball, his shoulder is over the ball because his torso is at that 45-degree angle to the ground. When you contact the ball, your racket, your arm, and the ball are all completely to the left of your upright torso. You can draw a vertical line that would separate the ball/your racket/your arm from your whole torso and head. The ball, your racket and your whole arm are on one side at contact and your head, your torso and your whole body are on the other side of that imaginary vertical line. If you made a vertical line between the ball and JM's chest, his head, part of his upper back, ONLY part of his arm, and part of his left shoulder would be on the side of the line with the ball.
Also, if you look at your contact, it is about the same height above the net, but, your contact is at the height of your belly button, and JM's contact is about the height of the center of his chest. That is because he is bent and you are upright.
In your video you start with your hips facing the side and much more upright than JM. You have almost no bend in the waist. So JM uses more hips and is much lower. His forearm moves more freely and right before the real swing forward his elbow rises to get more whip from the forearm. His feet are also a little farther apart and it looks like his knees are more bent. Well, your knees look like they may be almost straight.
None of this changes that your serves are excellent. I am not saying anything about that. But there are many details about body mechanics that are too different for me to feel this really looks like a Jun Mizutani serve.
Anyway, have fun with the serve videos. If that is your marketing gimmick, good luck. It doesn't really matter to me. The serves have great spin regardless. So there is something you are definitely doing right no matter what.