To play devil's advocate, what in this video would really train aiki so efficiently that you could learn it in 90 days, or learn it at all? I don't see it.
I dont see anything internal going on there, maybe I need better goggles. Lots of knee walking. There's a diagram that looks cool, but diagrams are easy to find, and I dont understand the dialogue , so it could be that the exercises shown could be used as internal training, but I dont see it.
Of course someone is going to say that's their uncle and who am I to say what. From where I stand , I dont see it either.