Took me a moment to notice that this is a presentation with multiple slides (despite the site name).
Interesting though. Last Century a couple friends and I figured out the cube. We did it different than all the methods I've seen: 1 side then all corners, opposite sides, then middle layer.
They are very satisfying to move.
My favorite rubiks cube variant from the 80s (clones where everywhere) was the cube that had all the same colors so you couldn't mess it up.