Saw this on YouTube and had to tip my hat to the person that spotted this move!
“centerice 6 months ago -
Interesting observation for the banjo players out there: Never noticed before but the banjo kick off to salty dog is actually an edited-in cut of Doug playing the “B-part” of Banjo in the Hollow. Notice his capo is at the 2nd fret and he is playing in the key of A. Salty Dog is played here in the key of D and Douglas capos at the 7th fret. Actually, there is another YT video of them doing a reunion on Nashville Now with Ralph Emery where they do this tune and you can see Doug kicking it off like here, but capo’d up to the 7th fret.”
It’s a bit tough to see because the video is not the best quality, but he’s right!