The Dillards as "The Darlings" on the Andy Griffith Show do Dooley, though this is not on youtube, it is a video from the show.

This one is on youtube: Ebo Walker by the Dillards/Darlings.

There's an even funnier version of it (for the intro and "asides,") of the Dillards doing it in 2006 1999 at This Link.