While the video turned out (depending on your sense of humor) pretty funny, we did learn a bit about how to, and how not to, make a testimonial.
Lesson Number One: Be clear about the questions you are going to ask your subject. Let them know, before head, what you'll be asking them about so it won't come as a surprise. And if possible, let other subjects listen/watch other subjects being interviewed.
Lesson Two: Try and make the subjects feel comfortable, get warmed up before you start asking them the questions you will want answered for your testimonial
Lesson Three: Be prepared for either the unexpected or even to end up with content that requires going back to the drawing board. We call it: ready, fire, aim.