He mentions that decision in the comments.It's a nice video, but he doesn't even mention Memphis barbecue, which is usually considered to be equal to Texas, KC, and Carolina as the "big four" of major barbecue styles. An odd omission.
It's mentioned once in passing which is about all it deserves, imo. I'm not a huge BBQ guy and can tell you the cliff notes about the big three. I had no idea that Memphis has it's own BBQ or what would make it stand out.
Gotta draw the line somewhere and Kentucky mutton BBQ is far more interesting than anything from Tennessee.