Marketing Land have a good point.
People love to find out what other people think of doing business with potential suppliers. Businesses have known this for years and that's why customer testimonials are a powerful and valuable commodity. Businesses create case-studies, or embed client quotes on their web pages and marketing collateral, and they do it because social proof sells.
Next time one of your clients has a great story of how your product or service has helped them, consider video as the perfect medium to capture their testimonial. Video connects people to your message more directly and more effectively than any other marketing medium.
Hearing the story of a happy client allows potential customers to link to your offer on a more personal and emotional basis. Buyers hear lists of features and benefits all of the time, video offers an opportunity to show them how you can make a difference.