Therefore, most videos will need a short introduction explaining the goals and context of the work. To maximize the utility of the video for the viewer, you should also provide pointers to further or related work. Showing one or two slides containing references that the viewer can find can do this. However, show these slides only briefly, as the viewer can always pause or replay the video to copy down that information. Before taping begins, have a detailed script of the video that has been thoroughly rehearsed.
Videos require much more planning and preparation than most people think.
Find someone who doesn't understand what you do, sit them down and give your demo to them before the camera arrives. It's good practice in speaking and helps to clarify the delivery of your ideas. If your demo involves a larger group of people, it will be especially important to have the major scripting and production bugs worked out beforehand. It is generally not appropriate to hire professional actors to appear in your video. Usually the most realistic and convincing advocate of an idea is the person responsible for the research.