The AHWLA website makes use of video material to better illustrate points referenced in its tutorials.
The video material is in Adobe Flash format and will start playing automatically. To play the Adobe Flash video files in your browser you will need to have the Flash Plug-in installed on your computer.
Plug-ins add functionality, in this case, video, to the basic web browser software on your computer. Plug-ins are free, you just have to download them.
If you can clearly view the clock below, you already have the Flash Plug-in installed on your computer.
If you are wondering which clock I am talking about then please download the player using the link below.