Regarding the tutorial: You spent a lot of time on this. You want the tutorial to be detailed. I understand!
I would suggest upping the tempo. If someone misses something, they can always skip back. Or you can have a fast one, and a detailed one.
Or, to put another way:
If you want to sell these textures, if the tutorial isn’t dragging something into the workspace with visible effects within 5 seconds of starting playback, you’re losing the customer.