To view the video in Windows Media format, you will need to install Windows Media Player. Windows Media Player is a free download available for Windows and Macintosh operating systems here:

http://www.microsoft.com/windows/windowsmedia/download/default.asp

To view the video in Real Player format, you will need to install Real Player. Real Player is a free download available for Windows and Macintosh operating systems here: 

http://www.real.com/realplayer.html