More videos like this can be found at http://www.theurbanpenguin.com
The Citrix XenServer does not offer a graphical console for your Linux Virtual Machines. This is not really an issue although I can see some would like to be able to access the Linux GUI from XenCenter. You can easily enable VNC and connect to your Linux Server from any PC with the VNC Viewer or java browser. The video steps you though a text install of openSUSE 12.1, adding XenTools and enabling VNC.