Here, screen shots:1) Before contact the racket is vertical (not closed at all).
2) In the followthrough, the racket is completely vertical as well:
3) This last photo is hard to sort out without watching the actual video in slow motion. Your slow motion version, the quality is not good enough. I watched the regular speed video on the slowest speed YouTube allows (0.25x speed or quarter speed). I will explain the last photo under the photo:
The white line near your wrist that is parallel to the ground is the path of the ball and racket as the racket is vertical. So, you contact the back of the ball and during contact the racket is going almost straight forward, almost parallel to the ground. The shot probably has some topspin.....but it probably does not have a lot of topspin.
You drive directly into the ball. The racket goes from below the table till it is behind the ball and then the racket goes mostly forward and up only a little from the point where the racket is behind the ball. But this ball is fairly high. So, it seems to me, the right shot to make on that ball.
So, it makes no difference. It is a nice shot.
One way to test that would be to hit a shot like that directly at your friend's racket and have him block the shot with his racket closed only slightly. If the ball has real topspin and his racket is not very closed, the ball will go up several feet and pass over the net 2-4 feet higher than the net, maybe even higher than that if the ball really has good topspin on it. If it has mild topspin it will go more forward than up, but it will go up a little. With the racket very mildly closed (pointing a little down), if the ball goes straight forward or forward and down, it would have very little topspin.
One thing to note: shot like that may be harder to handle for an opponent if it does not have a lot of spin because you are likely to have someone return the ball into the net when they attack that or block it as if it was heavy topspin. So, it would be almost like a shot from a Short Pips player where the ball has pace but feels empty which means you have to spin it back with heavy heavy spin or you will make an error on the return.