Videos are being used increasingly by firms with sizable production budgets. This medium is characterized by high price and a lack of flexibility: Videos are not only hard to update inexpensively, but also can't be controlled by the presenter. Because the speaker has to stop the video to comment, most video presentations are designed for continuous viewing.
Videos make up for their drawbacks in sophistication and power. They most closely resemble the television and cinema experiences by which people are so swayed, and production can be very slick indeed. When both budget and occasion call for a powerful presentation, videos are particularly effective. If you ever use video, get to the site well in advance to check the setup. Nothing messes up a presentation faster than a VCR or DVD player that won't work.