Step 1 : add the medibuntu repository
$ sudo wget --output-document=/etc/apt/sources.list.d/medibuntu.list http://www.medibuntu.org/sources.list.d/$(lsb_release -cs).list
$ sudo apt-get --quiet update
$ sudo apt-get --yes --quiet --allow-unauthenticated install medibuntu-keyring
$ sudo apt-get --quiet update
Step 2 : Install codecs
$ sudo apt-get install non-free-codecs
Step 3 : Install DVD Support
$ sudo apt-get install libdvdcss2
Read more: LinuxTree