[orca-list] Playing dvds in Ubuntu mate

[Michael Weaver <weavermicha googlemail com>]

How do I play DVDs in Ubuntu Mate?
The DVD is an original copy because it is a BBC classic Doctor Who, I have 
VLC on my laptop and I am sure I specified all packages to be installed 
when I was helped through the installation.
I insert the DVD, I am read a message by Orca that a DVD has been detected, 
I okay the screen which launches VLC Media Player, the DVD sound like it is 
trying to read and no movie gets played.
I hit space with the same result, I try to open the menus with ALT F10 I 
think but I can't access the menus that way.
I think at least in stock Ubuntu there was something you had to install 
from the terminal, libdvd or something but I am not sure if this package is 
needed in Ubuntu Mate and if it is, I can't remember the exact name of it.
Orca gives me no error message as to whether I am missing any packages or 
video codecs.