shooting client testimonial videos

I have a data base of past clients I would like to have videos shot of going over their experience. I would like to see how these first videos turn out then offer this service to my partners as a bonus to partnering with me. they would be short 1-2 minute videos interview style. But I am open to a different approach if it is creative enough and gets the same point across. This is going to be more likely on the west valley