This article is worth your time.
There are 7 examples, but one stood out in particular because it has been a hot topic of discussion for some time among my clients; why use video? or Should we get more video on our website for SEO purposes. See #2
What you should take away from this is that media can be good, but you have to be careful with how you use it. If you are using media to help sell your products or services, that’s great. But if the media is a distraction, then you’ll decrease your conversion rates.