Ubuntu can’t watch DVDs out of the box. To do so you need to install lidbdvdcss from medibuntu. Do the following:
sudo wget http://www.medibuntu.org/sources.list.d/$(lsb_release -cs).list --output-document=/etc/apt/sources.list.d/medibuntu.list
sudo apt-get -q update
sudo apt-get --yes -q --allow-unauthenticated install medibuntu-keyring
sudo apt-get -q update
sudo apt-get install libdvdcss2
side note, if you wish to install support for wmv and realmedia do the following
i386:
sudo apt-get install w32codecs
amd64:
sudo apt-get install w64codecs
WincenTech 