I remember a post in... Reddit I think it was? where I commented on an early video discussion that he should teach online full time, because that kind of intuitive education was sorely needed. He actually answered the comment, along the lines of "that would be cool but I already have my hands full in $UNIVERSITY".

I think it was relatively soon after that interaction that he started doing youtube full time. I've always wanted to think I made a teeny tiny contribution to move the needle there :)