I just watched this on youtube the other day, and thought it was brilliant! The part where she starts talking about the batting and how she joined it is about 7 minutes in...she quilted that huge quilt on a small home sewing machine!!! I think the most important lesson (for me) was that she says never to cut your batting in a straight line, because it will always fold there right down the line when you're done quilting the quilt.
https://www.youtube.com/watch?v=xMo474kDQ0A&t=699s