A few more that aren’t on the list - worth checking out if you like this sort of thing.
Wintergatan - he’s known for a music video called Marble Machine, but it turns out that was just a prototype, and he’s now building a much improved version, “Marble Machine X”, which will play music live on stage by dropping tightly synchronised marbles onto things. It’s a huge undertaking and he’s documenting the whole thing, from CAD to assembly, including all his false starts and unexpected challenges. He’s a great presenter and it’s fun to follow him on his huge project.
Pocket83 - makes all sorts of things and muses / rambles about them. He’s primarily a woodworker and the videos often have the form of a woodworking tutorial, but he’s inventive with other techniques too.
kiwami japan - makes knives out of things like wood, resin, milk etc., using only hand tools and kitchen equipment, then sharpens them, then measures how hard they are. It’s an oddly entertaining mix of impressive engineering knowledge and straight-up weirdness.
Oskar van Deventer - makes mind-bending twisty puzzles, mostly by using a professional 3D printing service. I’m not sure how much he belongs on this list, since he generally shows the end result rather than the process, but he’s an incredible maker.
Luke Towan - makes incredible dioramas. He has a series in which he walks you through every step, which are fascinating even if you have no intention ever to make one.
