Ive not been able to find the doc on youtube either... It was made in '89 or '90, probably by a local (South Bend, maybe?) PBS affiliate... I remember us all gathering by the t.v. when it aired and my grandma has a VHS copy... I've searched for it from time to time since the internet became a thing, but like I said, no luck.
Now that I'm off work, I'm searching for the video of the people that own the Mcclung road property and haven't found it, yet... maybe somebody on here can help me out if they've also seen... I'm thinking now that it might have been a local news piece with embedded video, but it was a couple years ago that I saw it, so I can't remember.
Belle was a beast... One of her husbands died from "a large meat grinder falling on his head from a tall shelf." I always thought Kathy Bates should play her in the movie version.