He just posted a follow-up on his other channel, with more details: https://v2.incogtube.com/watch?v=hOyGO9wkn4U

An interesting trick is he pre-heats work pieces to help hot glue bind to wood (of course, he's in Canada in a cold workshop).

The other Youtuber he mentions at the end is https://v2.incogtube.com/user/wintergatan2000 with his elaborate crank and marble mechanisms.