I saw this (episode 1) and episode 2 a few days ago. At the end of episode 1 I was left pretty skeptical that he'd ever get this contraption working well, but the solution he shows in episode 2 completely flipped my expectations and looks aesthetically incredible.
(He makes his own very thin brass coil springs to run the cables through.)
Each new episode of this I've said to myself "wow, that problem is much harder than I expected". Then he solves it in an elegant way, and I realize the problem is even harder than that!
I'm into a number of the hobbies he's good at, and it's incredible how much skill he has at design AND fine working AND manual machining AND cad/cam AND on and on... I'm really glad he started a youtube channel.
(He makes his own very thin brass coil springs to run the cables through.)