There are numerous documentary films which are available other
than the current Ken Burns Country Music series.
Below are two I think should be of interest.
Hope list members will suggest others, and comment about them.

Best wishes, Thomas.

1. BIG FAMILY - The Story of Bluegrass
   currently (Sept 2019) on PBS
   Big Family

2. The WOMEN OF COUNTRY
   CBS 1993 - currently available on YouTube
   https://www.youtube.com/watch?v=vP1LJ5XwWVw