Sal Kahn has put together a ten minute video on what he believes is important in making his videos. His tips include
- be yourself (my students love when I put in personal items)
- don't make it too professional
- talk directly to the students (not too far above or below the students' intellect)
- use colors and visuals (but not too fancy)
- Keep the video under ten minutes
- I would add that you should either have your PowerPoint points cued up or even better have a number of webpages ready with perhaps images, sounds, major points etc. that are lined up and ready to go. Kahn says (and I agree), do not script it out beforehand. You do not have to be perfect.
We have a lot of posts on flipping your classes which you can find by going to the search engine in the upper left.