In the 1970s Craig Mishler spent some time in Old Crow and northern Alaska, and wrote a scholarly book documenting Gwich’in fiddle music and culture. It’s called The Crooked Stovepipe; Athapaskan Fiddle Music and Square Dancing in Northeast Alaska and Northwest Canada, and it’s available at the Inuvik Public Library. I had it out a few years ago.  The video shows Charlie Peter playing some tunes in 1972 – there are some familiar ones, and some interesting variations of them too.