Just watch a bunch of my short videos on http://www.YouTube.com/antion You don't need to watch my long ones. Just the short ones. It will give you ideas.
Here's a simple formula for YouTube videos designed to drive people to your site (as opposed to videos where people are already on your site)
=> Hi I'm [insert name]
=> I know you're here looking for information on [insert keyword]
=> Well you've come to the right place.
=> Add some of your credibility. Example: I've been working in the field of feng shui for 22 years...
=> Give them a tip.
=> For more great tips like this visit [insert your website and spell it out if necessary] where you can download [insert your freebie here]
=> I hope to see you at my site
I've had great success with these formulas over the last 3 years with hundreds of thousands of views.