He is repeating parts of the "solid theories" developed and popularized by someone else and sharing some of that persons foundational research.

Hopefully this video will inspire people to go to the original source who does NOT conflate guesses with facts.

This is a topic that's faaar too complex to be understood and vetted via a video lecture. That's why the originator researcher and populizer of the Devolution Theory uses articles with links to his many primary sources.

He is repeating parts of the "solid theories" developed and popularized y someone else and sharing some of that persons foundational research.

Hopefully this video will inspire people to go to the original source who does NOT conflate guesses with facts.