Hi Pink,
I'm posting a link off the DigitalDaredevil site that is good helmet-cam footage of the Port Angeles Spring Fling course near Port Angeles, WA on the Olympic Penninsula. It's pretty typical Pacific NW DH course, though not as technical as many, so it might be just what your mum needs to see.
DD does some good vid work. They have a helmet-cam trailer of the Silver Mtn Idaho course too. As soon as I find it again, I'll post it up. In the meantime, go here:
http://www.digitaldaredevil.com/ddme...album=24&pos=4
Good luck!
(P.S. - Careful of the audio bed when Mom's watching it)