1 Building an 8-bit breadboard computer!
Ben Eater's playlist building an 8-bit computer on breadboards from basic logic chips, widely recommended for understanding how a processor works from the ground up.
Topic
computer fundamentals
2 videos. Ranked by independent recommendations, not by views.
2 8-bit computer update
Entry point to Ben Eater's breadboard computer series, linked when someone asks how a CPU, registers or clock cycles work at the hardware level.