If you are interested in learning more about communicating with video, the Web is filled with incredible resources. Three sites that have particularly useful information include:
http://www.youtube.com/video_toolbox http://www.ourvideo.org/toolkit/files/content.htm http://current.com/make/training
However, the most important thing to remember about video is that it doesn't need to be technologically complex. If you keep the focus on what can be learned through making the video, in addition to the actual video, you can use the process of creating video to help your students learn more efficiently.