Video testimonials are key to successful marketing for your brand. The majority of audiences are visual learners and nothing is more reassuring than real facts, real experiences, and real interaction from your patients/clients/customers. For the healthcare market, this is an example of a patient testimonial Savvy produced for The Spine Institute of North America:

"You must have lots of great feedback from your clients and customers, raving about your products and services. Maybe they’ve provided you with case studies and quotes which you already share with other prospective customers. A great way to make this testimonial even more compelling is to film it. You can do a simple piece to camera where your clients answer questions about how your product or service helped them. You can also use text or animation to give important information and data about exactly what benefits your brand bought them. These testimonials can then sit on your website, ideally above the fold on a key landing page to help persuade viewers of your credentials. You can also use them in sales pitches and marketing emails."

source | http://happyhourproductions.co.uk/news/2016/11/types-of-corporate-video/