This is hugely annoying!
I can play most DVDs without any bother with VLC. I recently got 'The World at War - Ultimate Restored Edition', but the discs won't play!
First, VLC just wouldn't open the DVD. I kept trying, and eventually it opened the DVD, but the audio and video were massively choppy.
I tried uninstalling and reinstalled VLC. Now the audio and video are distinctly less choppy, but it's still very irritating.
What gives? It's just these DVDs, and I don't get what's different about them!