If a media piece grabs the attention of the audience, stirring their emotions, it will enhance the presentation of information.

This is a true statement. Images, when used sparingly and in concert with data and information that fits the scope of the image, can greatly increase the impact of a presentation. This is especially true when playing to emotions: people who are emotionally stirred by a presentation will be much more likely to remember what was presented than people who become blase during the time spent.