Per Vognsen announced
a project that, in my estimation, could not be more handmade. It's called Bitwise, and you can check it out here
To me, the beautiful thing about Bitwise is it will obviously complement Handmade Hero with additional depth. There will also be articles outside of the educational videos, so those who prefer to read might be in for a real treat.
P.S. Thanks to eisbehr
for bringing Bitwise to my attention.