This is a pretty well worn video... I've seen it posted dozens of times on various audio nerd social media sites.
It is a good design, in general. That particular manufacturing process is surprisingly complex and slow, but I imagine the typical build is an assembly line approach. I believe the guy building that speaker in the video is likely the designer showing how each step in the process works.
The double wall is cool. They are not addressing the idea of flexing walls (which lowers bass efficiency), but they are addressing vibrations (which improves waterfall and decay performance). Overall, it is a good design. The midrange drivers are insanely gorgeous, and look awfully similar to those from ATC and others which are incredibly good sounding. Same for the tweeter. As for the woofer, I have no idea.
Being hand made in Switzerland makes these a solid 2x more expensive to deliver to buyer than a similar design hand made in China or Indonesia. As such, while I am certain it sounds great, dollar for dollar there are other brands that can sound just as good for less money.