If you want to play video, you might install openbox into your Xubuntu system (any time after installation of Xubuntu)
which gives you a very simple window manager (no full desktop environment), and it will be faster for playing video than with the default Xubuntu desktop. I think openbox has LTS thanks to Kubuntu 12.04.2, where it is included.Code:sudo apt-get install openbox
Select which desktop environment to run at the log in screen. Simply right-click on the dark grey background to start a terminal window in openbox.