How to Play Encrypted DVDs in Hardy

In order to play DVDs you need to install the Medibuntu Repository and a couple of packages.

This will add the Medibuntu repository to your repository lists
In a terminal type:
sudo wget http://www.medibuntu.org/sources.list.d/hardy.list -O /etc/apt/sources.list.d/medibuntu.list

Then you have to add the GPG Key to authentic the packages
In a terminal type:
wget -q http://packages.medibuntu.org/medibuntu-key.gpg -O- | sudo apt-key add -

Now update your system to load the Medibuntu repository into your apt-get sources
sudo apt-get update

Download the DVDs playback packages
In a terminal type:
sudo apt-get install libdvdcss2 libdvdread3