When we say multimedia we mean interactivity and smarter ways to communicate with others using their passion to whatever moves or making sound.
People normally likes actions, so that what media does. Makes more interaction with people in the business world they are your customers.
Producing media has many ways depends on your budget that you willing to spend on making a couple of minutes attracts your customer
Media samples is a lot to contain, it can be an animated website, animated CD contains your products and services, a movie that pre recorded for your production facilities, an audio record that provides the same information hosted over your web site or your CD.

Advice: don't go an event without media product, if you did you have lost a lot of prospect, some people don't get enough by seeing your nice product face to face just make sure you have always left a CD or your web site link that reminds them with your nice products and services.
imagine that you have your own big screen display and you are running a nicely taken movie of your factory while producing your nicely product and there is a very attractive moving music playing in the background, for a moment imagine how many will watch that movie of yours, I think a lot will freeze in their place and see what you have to show them.