I used the two videos sold by Homespun. Brad Leftwich does the teaching. There was one major problem. For "old time" music, scodatura works better than standard notation for the melody.
I started playing what I saw, and it did not agree with what I was hearing on the CD. I emailed and asked Brad about it, and he confirmed my suspicion that standard notation for the melody was used. But the fiddle is not in standard tuning, so the notation was useless. When I wanted to learn a tune, I created scordatura for the standard notation and didn't have any problems.
I think Brad Leftwich is a good instructor. Homespun should have provided scordatura for "open" tunings.
I tried to get some instructional material on "Old Time" fiddling, but it can be difficult to find.
Chickenman - I am an old geezer and it exceeds my energy resources. I just can't understand the scarcity of scordatura for "old time" tunes. I would think that quite a few fiddlers would give it a try. Scordatura and recording for a half dozen or so popular "old time" tunes. Three versions of each tune - basic, intermediate, advanced intermediate. Also included would be a DVD that demonstrated techniques.
I think "old time" fiddling would be more widespread if there were learning options other than face-to-face. Interest in this type of fiddling seems to exist in "pockets". So if a fiddler doesn't live near some musicians playing this music, it can be hard to learn.