The interviewer asks prepared questions, and the interviewee responds with prepared answers. A narrator, usually off camera, takes the audience on a visual tour, reporting on the program topic. Visuals are accompanied by narration from someone off camera. The narrator may describe a job procedure being demonstrated or may comment on other types of visuals. The person on camera describes while demonstrating.
Actors play roles in a scripted story.
Cartoon characters provide instruction. I can't lose them. Smooth transitions are required when I cut from scene to scene. Important points will be hammered home by using both video and graphics. If I can, I will repeat those points before the ending of the script.