I feel as it is a bit upsetting that you openly ask for a tutorial for someone elses work.
You say it's taught on the Trilogy (or at least an early concept of it is)...
what's the name of the change on the Trilogy? Or, if I misunderstood, where can a version of it be learned?
Many people know this change. First off Dan and Dave started this change, and it's original change is G.O.A.T change. After, ineski and other people have found there own methods for the change. There is rumor that Dan and Dave will publish it in the fourth disc of the trilogy named AndThenSome, but were not certain.