Thanks for posting this. I love it. Blue Yodel 9 sounds like both folk and blues to my ear.

my grandfather loved and sang Jimmie rodgers. preferred jr to hank. hank changed it all. i think of rodgers as blues more than country.

My understanding was that Jimmie Rodgers was a forerunner of American Country music so much of his early material was not subjected to the crass commercial influence of record company profiteers and Nashville. I tended to recognise him as an early American folk singer.

I've got one of his records around.

I haven't seen this show, but if you get a chance, check out Lost Highway The Story of Country Music.
It's on YouTube