First things first: know your message. What is it you really want to say for this particular video? Next, focus. Literally. As in where you look. Remember the camera is always your audience. Next up is delivery. This is when you get to play with your voice and your style of speaking. Add some energy, dynamic and nuance. No monotones allowed. Last but not least, hire a media trainer. The rehearsing, practice and ultimate camera performance can be greatly enhanced with a coach.