From a business standpoint I think Grisman is kind of walking a fine line between a good and bad decision. Yes as the artist, he has the intellectual property rights to his body of work, recordings, and yes, video footage.
But I think maybe his attorney was behind this decision and not his manager. You tube is a great advertising platform as someone here stated earlier, and can only help an artist like Grisman who is not on the pop charts. it isn't like kids are out there asking about David Grisman Quintet. BUt You Tube could lead a few kids his way, quite a few in fact.
If he was poised to release the Sweetwater sets on a DVD, I don't think a few clips on You Tube would stop any of his fans from buying it, in fact, it would most definitely boost the sales. All they would have to do is put a nice package together and add some bonus footage never before seen and presto, you have a winner!
My guess is that he doesn't plan to produce this DVD, or have Justin Kreutzman put it together which would be a good move as well. SO Gris, you can do what you want, but I think you are making a mistake as a business man.
Seeing you at Tipitina's in '97 during Jazz Fest was still the musical highlight of that year for me. I just won't be asking you for any business advice.
There are only two mantras. Yum and yuk. Mine's yum.