I've been watching him for a few years now. I'm amazed at his computer modeling of thermal and structural stuff he makes.
He made some Hilsch vortex tubes, did interesting computer thermal modeling, and video'd his process of making and improving.

His CNC mill as well with his structural modeling. And the ultrasound knife he made and computer modeled the amplifier horn.
He has to put lots of time into the editing and added graphics. And his story telling is entertaining.