Suzanne, don't know about the video, but Miriam Nelson has several good books on weight lifting, and has done studies with "older" people (I'm 60 myself, so older in my book is like 80
). Her
Strong Women Stay Strong, and
Strong Women Stay Young have good suggestions for starting off slowly and increasing weight gradually to avoid injury. Check out her website
www.strongwomen.com She has some exercise routines specifically for older women. I just checked though and she doesn't have any videos/DVDs. Weight training is good for preventing bone and muscle loss thus avoiding osteoporosis.
I started back lifting last fall and now can lift considerably more than 3 lb dumbbells!