Apologies for being a bit OT, but new account so I can't post this question directly (if that's even the proper approach) - and they're semi-relevant to this question.

I'm trying to remember the location of some maths teaching videos, or enough about them to find them again. They were made by a member of the LW community, though hosted on his own page, and mentioned in a post about self-improvement or similar. I think I mentioned them on here before - they seemed like great videos individually, though sadly lacking signposts from one to the next as a collection. Anyone have any idea what I'm talking about?