I watched one on tonight on CMT called "The Lost Highway". It's a 4 part series documenting the history of country music. Tonight's was part 1, I think. It started with the Carter Family, them went on to the "brother groups" and the rise, fall and rise again of Bluegrass.

Maybe that's the one? They did indeed include coments by Vince Gill, Ricky Skaggs, Emmylou, Willie, etc,.

The next one reviews the rise of honytonk music and Hank Sr. Not sure when it's on next though. Check the listings.