Download the file called Material_map.zip from the FTP site and extract it to your hard drive.  The HTML file to play the video back in your browser. 

Most materials are not made up of homogeneous, solid color and need to have some sort of a map to describe a pattern.  Here you will learn about choosing maps to define the color of a tile material applied to the tabletop in the scene. 

Good luck and have fun
Ted