These businesses have long-term relationships with their customers. All that you need is to make a complete list of references and contact them.
Did they provide you with a professional proposal that clearly outlines what you’re paying for? Are they filming in high definition or standard definition? Is it a two-camera or three-camera shoot? How many days of shooting are involved?
Are they providing a complete buyout for all the actors as well as voiceover talent engaged to prevent additional costs? All of these are important questions to ask so that you can understand how each Video Production business arrived at the pricing they offered.