If you want to learn about simple microcode and how a (non-superscalar, which matches the 8086) CPU generally works, this is a brilliant resource, and fun to watch.
His entire channel is brilliant. I also love his homemade GPU. I forget sometimes just how fast CPUs are so watching him 'race the beam' (not literally anymore, but HDMI has timings just the same) is fascinating.
If you want to learn about simple microcode and how a (non-superscalar, which matches the 8086) CPU generally works, this is a brilliant resource, and fun to watch.