"Rock'n'Roll Odyssey" was a 75-documentary produced in 1984, and originally aired by PBS. It was subsequently issued as a home video, and was even available as a DVD.
It's an outstanding document for those interested in the music of The Everly Brothers, as it features interviews with Don and Phil, and also with other people, like Chet Atkins, who worked with them, playing and producing, for many years. The film also includes lots of vintage performance footage, some of it quite rare.http://www.allmusic.com/album/rock-n-roll-odyssey-video-mw0000268151
I have tried to find this on YouTube, but unfortunately the uploader only included the first 20 minutes of the documentary. If you know of any other source where to find the rest of the material, please let us know.
Anyway, here's what I could find. It deals with Don and Phil's beginnings in music :