Having spent quite a long time watching YT this weekend, I can confirm that there are now quite a lot of really good videos showing more of the building and design that went into this staggeringly wonderful machine - so if you only watched the initial song (over 10m views now) do look at his others or subscribe to his channel. He acknowledges that Matthias Wandell's gear design software helped him decide to do it, and shows his simple bandsaw production methods.
Brilliant!