Digital Video Design and Production Tips for Technical Communication 
Technical communicators can expect to see an expanding role of video in product documentation, training, and marketing presentations. This is largely due to three factors: (1) digital video lowers the technology and cost thresholds to bring video to the desktop, (2) video makes sense for conveying information involving movement, and (3) video is a popular consumer medium. To technical communicators, video is a new medium in which visual communication is key. Narration and text are subordinate. Technical videographers must learn and apply video design principles and good production practices to create effective video that communicates the information.
Robbins, David B. STC Proceedings (2001). Presentations>Tutorials>Video