The main linked article actually does not have that video; the article linked from in the description does have it. Not surprising that someone missed it.
Nitpick: The early moves in the game are called fuseki. Joseki refers to well-studied local patterns of moves and they appear through the middle game, not just in the early game.
A couple of things I love about go is that you don't need to memorize fuseki, and that applying joseki correctly is as much a matter of judgment as it is of memory.
(I am a 1 dan go player but haven't played much in the last 15 years.)