I've recently come across R D Middlebrook and his Design-Oriented Analysis theorems.. It's spiked my interest. However, since his passing his website is no longer available (most pdf content can be sourced from WayBackMachine serach: https://rdmiddlebrook.com/index.asp ).. However, I am trying to track down the DVD content that is no longer available to purchase..
TECHNICAL THERAPY for Analog Circuit Designers,
THE GFT: A FINAL SOLUTION for Design-Oriented Feedback Analysis and
REAL WORLD DESIGN for Analog Circuit Designers.
Yes have most of the print material... but was specifically interested in watching the course he presented.. It was available to purchase via DVD from his site which is now offline.