At the beginning he says something like "this is basic to intermediate, but for you this is going to be stupid hard", which is from the first (?) YSAP, "Distort, Warp, & Layer Effects" [1].
Reading your single comment (and watching the linked clip) was very much worth my time! I never before realized that you can address Excel cells via a symbolic name instead of row/column-wise. That is very cool and probably very basic. Now I'm going to watch the rest of Joel's video!
In fact, I think he directly quotes YSAP at 25:34
https://youtu.be/0nbkaYsR94c?t=1534
I'd have to find the right YSAP episode, but I'm 90%+ sure that Donnie says something extremely similar.