I like how he’s doing a play-by-play…
I mean I know all the states and where they are but HOW IS DAT SO PERFECT!!! O.O
legit looks like an outline well done for him 
!
Like I said…
He’s basically just using the story method… you can remember the story, you can draw the map. Starting in “the middle” also makes it easy to keep things proportional as far as the overall map. Like he says in the video… sometimes his FL is a bit off.