As the author of the video describes it:
“The technique called Scriptorium, developed by Alexander Arguelles @ProfASAr who is a world-famous hyperpolyglot, which I have used to great effect to improve my reading and writing as well as speaking and listening abilities in many languages.”
And an important comment from the comment section:
“I do think you’re missing one core element in Prof Arguelles’s method - there is no cat in your lap. Not sure how you’re going to get any synapses firing without that key ingredient.”
R