Beware though, client reviews on a companies website are of course controlled and moderated to present the desired image. However, if the company is using a third party website such as Free Index to collect client reviews, you can be much more sure that the comments are genuine.
Testimonials and case studies are of course very helpful, but a company that really understands video marketing should be able to demonstrate that the films they produce gets results, which go beyond anecdotal evidence. Video production companies should be able to provide facts, figures and statistics that back up their own marketing claims.
While a good video production company should be able to produce films for almost any industry, you should always find out if they have produced films for a similar industry or