Problem with backup my disney film

I make the backup of my films for protect from my child.
I utilized iso format becuase more simple but i have a problem with multi-angle or
If i burn a dvd the film is perfect but if i see the iso file with my WDTV i found more error.
All DVDplayers that i tried working well only WDTV have problem.
Can you help me?
Can you tell me If possible a update in the future about it?