I mentioned www.guitarvideos.com
previously. They are some of the Homespun instructional videos at www.homespuntapes.com
where downloadable samples are wmv and wma instead of realmedia.
Check out Bob Bronzman
on bottleneck guitar.
Watch Roy Bookbinder
play guitar in an open tuning.
Watch Keola Beamer
playing slack key guitar.
There's lots more--jazz piano, mountain dulcimer, vocal (gospel chorus singing to how to yodel), banjo ...
Don't miss Doc Watson. I was fortunate to check this video out from the library. There's one pause in a song that makes my knees buckle. From the last 10 seconds of the sample clip
you get a hint of why he is a national treasure.