In this first video taken from the documentary, Earl Scruggs: His Family and Friends, you will see Roger McGuin and The Byrds performing with Earl Scruggs on the banjo. After a little bluegrass session, they do the song, "You Ain't Goin' Nowhere," by Bob Dylan. The song had been in The Byrd's repertoire, having been recorded for the 1968 album, "Sweetheart of the Rodeo." (To watch the entire documentary, available on YouTube, go here)
This second video features the recording from Will the Circle Be Unbroken, Volume 2, with Roger McGuin, Chris Hillman and The Nitty Gritty Dirt Band.