Most of my viseos teach the history and how to play the songs on the guitar:

Learn to Play Crow Jane Blues: http://www.youtube.com/watch?v=dSzMmYMv9Qw

Learn to Play Fishing Blues: http://www.youtube.com/watch?v=fxRetVhGFhs

Learn to play train on the Island: http://www.youtube.com/watch?v=asHbkJzbXmE

I've only got several thousand more to go- lol. Hopefully I'll start doing some obscure one like I just did "Braes O' Yarrow" yesterday- a version no one knows.

Richie