I didn't want you to think I was ignoring you, but I haven't used any videos (although I want to!) so I don't have any recommendations. But I know I've seen some people on here recommend some, so hopefully you'll get some good recommendations.
You could also check out this site:
http://www.megayoga.com/
I don't know if she has a video, but probably. She focuses on adapting yoga poses where needed for larger sizes, in a very straightforward and practical way - something unfortunately still lacking in much other yoga instruction.