Everything you can learn in an undergraduate cs course (and so much more) has already been written in a hundred different books all available on amazon for a considerably lower price and shipped right to your door. If information was all that teachers (and educational institutions) offered, they would have been replaced a long time ago.

And I'm saying this as someone who prefers to learn from books. So what else is there? Individualized attention? Community and networking? Human interaction? Motivation and structure? Signaling? Probably some combination.

Any real replacement needs to address all of these; video lectures, digital notes, and online questions are just reinventing what I can already pick up at the book store.