It’s a cool approach, but I don’t do it like that, and it’s probably a lot easier to just use one or two of them first…
What he’s doing is making a progression of parameter changes that are additive, meaning each one has all the other changes done to the ones before it included, so as you progress through them they keep steadily changing the sounds and don’t jump back to where they were previously in the progression.
He’s setting it up in a way where you progress from scene 1-8 always on the left of the fader, and scene 9-16 always on the right. This is sort of a way to keep things logical, 1-8 are on the left so use on left side of fader, 9-16 on the right so use on right side of fader. Progress through each numerically.
So the progression goes 1-9-2-10-3-11-4-12 etc… Each dash is a fade…
So there’s that, but I wouldn’t worry about that so much yet if it’s confusing, just use a couple and check em out…