45 hours of watching is not the hard part, it is actually learning and understanding and exercising. I've followed few MIT courses (mostly on algebra, category

45 hours of watching is not the hard part, it is actually learning and understanding and exercising. I've followed few MIT courses (mostly on algebra, category theory and some more CS-related) and while a video took me 1 hour, the actual amount of time around it (writing down the important things, summarizing, exercising, finding answers about the topics touched) was much more. Between twice and 4 times the amount. On that front in-person education has definitely two benefits: you have peers in your same situation with whom you can discuss the topics and obviously access to teachers and their assistants.