How social media works in the business world - any demo videos?

How can I demonstrate to colleagues how social media works in the business world. Many of them think that it is just fun stuff that kids do. Is there a video out there which shows how social media works, e.g., a B2B marketer is on Facebook and twitter, blogging and tweating about a conference she recently presented at. A friend of a friend is interested in the topic, see posts and reaches out for more info. The marketer sends link to her blog with downloadable podcast with much more detailed info. Prospect speaks to others in their social network who have used service, reads reviews on industry blog, posts specific questions about certain aspect of the service to the community, etc