fiddle tune in episode 2 season one?

The. Man playing the fiddle in the last four minutes, is playing a tune, where did they get this version? Couldn't believe i heard my grandmothers version of The Orvetta Waltz! Wow! YouTube it by Vesta Johnson! The same tune! Totally, I say this becaus she plays it different than the actual musical score for this waltz! Which you can also hear on YouTube also, or find on the web. Amazingly cool!