In order to run the videos properly which I have pointed you to on this site you must install a video codec which is not standard with windows. To do this follow the steps below:
1/ Go to the website www.techsmith.com
2/ In themenu at the top of the web pave click Downloads > Video Codecs.
3/ In the Download center page click on the Download TSCC Codec link.
4/ In the File Warning Dialog click on the "Run" Button.
5/ An Install Dialog will appear, Click Install.
6/ In the TSCC Installation Complete dialog, click Ok. (this last step. does not take long so don't worry it has actually done something)