A video testimonial is common on websites these days. They're almost always effective and often a centerpiece to a landing page or homepage. Testimonial videos can help you a lot when it comes to building trust and informing your target audience about how good your product is. Like most videos in general, your testimonial video should include a definitive intro and outtro.
The most valuable part of a customer story video is the getting your customers to vocalise the problem they were faced with and how your company provided a solution. Along with interview footage, this type of video is typically packed with lifestyle shots (known in the biz as b-roll) of your customer using your product or service in their own environment.