This module allows you to run YouTube video as a background of your web site. It has few parameters that allow you to control on which pages to display the video.
Setup: Install the module, go to Extensions->Module Manager, open it, enable it and enter the following minimum data:
YouTube Video ID: This is for example here, the bold part of http://www.youtube.com/watch?v=KKTxSN7njhE
Enter the ID...