Do you use video to teach your students? Video is a broad term and you probably need to determine what it means. It could be defined as using media to create discussion, creating a video for Youtube, providing feedback with video in an online class, and many more applications. Screencasting is a form of video production as well.
I am not sure anyone can successfully dispute the value of using video since it has been shown to engage students. However, there are several other variables to consider before using video:
1. Do you have the tools and skills?
2. Can you create a professional look?
3. Do you have a script?
4. How much time do you have to invest in the project?
5. How will you share it with your students?
You may want to read a book on shooting video. One good is this: http://www.amazon.com/Shoot-Video-That-Doesnt-Suck/dp/0761163239
Check out Ten Most Popular Educational YouTube Videos in 2013:
Finally, review this site: http://www.learningsolutionsmag.com/articles/596/best-practices-for-using-video-in-e-learning