The first video covered New England, The Foundry and Dixie.
Oddly enough, the regional cultures have become much more distinct and polarized since the book was published in 1981. And yet, they have also weirdly become more blurred. The country is fracturing along the lines of class, regional culture, religion and education. Regional tensions are much higher than when I read and reviewed the book and thought a lot about cultural geography between 2011 and 2014.
Note: I inserted in the first video below.