The videos on my website are encoded in a format called ogg/theora, (which might sound scary, but really just means that very smart and very creative people invented it).
Many modern operating systems support theora out-of-the-box. If the operating system you are using doesn't, then you can follow the instructions below to quickly get setup.
GNU/Linux, (Debian, Ubuntu, Fedora, etc.)
Everything should work out of the box with a video player such as totem, xine, or mplayer. If you do have any problems, ensure that the libtheora package is installed.
First, download the Windows OGG codecs. When you open the resulting file, you will see a folder containing two files. Double-click the file that ends with .exe, and then follow the standard installation prompts. You will then be able to play .ogg videos from this website with Windows Media Player
Mac OS X
First, download the XiphQT package. When you open the resulting file, you will see a folder containing several text documents and one XiphQT icon. Click and drag that icon to the Library/Components folder within your home directory, (which will make it available for just your current user) or to the Library/Components folder from the top-level of your hard drive, (which will make it available for all users). You will then be able to play .ogg videos from this website with QuickTime Player.
For more information (and the latest version of xiphqt) see the xiphqt download page.
If you have any questions or problems in following the above instructions, please don't hesitate to email me at email@example.com.