This video is a good basic video on fasting. It is seven minutes and forty-four seconds long. Here is a little blurb from the description:
"What is water fasting? What are its benefits? Intermittent fasting is gaining huge popularity as a dietary option, but what actually happens to your body when you fast? When I first heard about water fasting, I thought, “No way am I doing this!” But after doing some research and finding out about the benefits of this process, I changed my mind. And now I'm going to tell you what I experienced during my 20-day water fast."