I'm only 20 minutes in, but I can already tell you that you won't be disappointed. I feel like after just about a third of the video I already fully understand the physical and logical disk format. Like the previous videos, it's chock full of dense information presented with very clear visualization.

Does a high quality version of the Ultimate C64 Talk exist somewhere? I only see fairly low bitrate versions of it. (The embed on Michael's website is dancing postage stamp-sized.)