Encrypted DVDs Do Not Autoplay

[Daniel Casey <danielcasey@q.com>]

I have installed Debian 8 (Cinnamon desktop) from a live DVD.

When I insert an Audio CD or a non-encrypted DVD into the drive a window 
will appear asking me what I want to do.  I know how to change the 
settings to cause the disk to automatically play with a particular 
program (e.g. VLC).

However, when I insert an encrypted DVD into the drive this window does 
not appear.

I am, however, able to open VLC and play the encrypted DVD without any 
problems.

Although this is not a hardship, I would like to learn how to resolve it.

Thanks,

Daniel