https://perimeterinstitute.ca/psi-lectures
This is a accelerated theoretical physics masters program for students who are on track to poke a hole in the circle that is the theoretical physics knowledge boundary.
https://www.youtube.com/@lecturesbywalterlewin.they9259
Back story: He got in some trouble with a female student and his videos were removed from OCW. I'll leave it up to you if you care to delve deeper into that story, but his body of work is unparalleled.