Maybe, I also work with blender animation myself a bit, this author has quite a few good skill sets(e.g. thigh/ass/belly jiggle, liquid sim, boob jiggle etc). The jiggles require some good tuning of sets of value for various speed of animations, time consuming(reasons for not using it) but once set up would look really good. You can still see some small defects in the video, but small enough to be ignored. And the overall motion itself is better and smoother than I would say 70% of hoyoverse game-related r18 content creators. There's only one thing that I might add to the overall physics is the penetration physics of vagina using the "shrinkwarp bone and torus" method, giving it more control and prevents clipping of models, in the video is too static with slightly amount of clipping.
Hopefully what I just said wouldn't "damage" the viewing pleasure of the video, but hey, it's only the first video, got a long way to go and improve