Here is a link to a short video explaining and demonstrating the EZ Witness Tool if using it to witness to someone.
http://www.youtube.com/watch?v=yOWSb5SGIMQ&feature=youtu.be
I am a little longer winded in the video below 😛
http://www.youtube.com/watch?v=5cpCWprU0wY&feature=youtu.be