I'm sorry, but the sudden jump in complexity on this baking subject is ridiculous. It's introducing numerous new terms and very complicated features in passing with no explanation.
In my past, I've written and recorded many tutorials (on numerous topics, and I understand how much work is involved), and if this were my own work, I would totally reorganize the tutorial, rewrite the baking videos, and perhaps even move them somewhere else entirely.
As it is, it may as well be in Chinese.
I don't mean to be negative. I hope you will take this as constructive criticism. The earlier parts of this tutorial were first class. There's no reason the whole thing couldn't be first class too! :)