A customer testimonial is exactly what it sounds like; it is an interview with a satisfied customer about how well you served them. This kind of promo is a very strong form of social proof. Customers see these videos and immediately trust your business more after hearing from someone who liked working with you.
Better yet, with a customer testimonial, you’re not just getting the attention of people who end up on a landing page. The customer featured in the video will share it with their friends on their social media. They will talk about it with their close friend groups. An organic reach of highly qualified leads can come directly from the customer you interviewed.