Whether you are writing an article or book, or recording video or giving a live presentation, you need to show yourself as an authority on your subject, otherwise there is no point. Luckily, if you do even a minimal amount of research on a niche topic, you can sound like you are a full-fledged expert, by using the A.S.K. system for establishing authority:

http://www.youtube.com/watch?v=fA8-C6ut5_0

The first thing you need to do is do exactly as I have done in this article,...