That's an interesting video, although a bit expensive at the moment. I like the built in torque arm.There's this one, which is a bit expensive. I've never seen it in the flesh, so I can't say anything about it. There must be a discussion on ES somewhere.
Grin All Axle Hub Build - Hub Motors - Ebike Parts - Shop
Custom build of a Grin All Axle Hub Motor, using updated 2019 motor design with disk side cable exit and the L1019 connector. Allow ~2-3 weeks manufacturing timewww.ebikes.ca
I think they are direct drive, could be wrong.has someone designed a gearbox with a through axle hole?