I learned this at a forum some time back. And I have to say that it works really great. When promoting affiliate programs, I find that I get more sales per 100 visitors than any other techniques.
It works by creating a video review for an affiliate product, primarily with ebooks on ClickBank. But it does not mean that you have to stop there. You can use this technique with any product that you are promoting as an affiliate.
But I have to tell you that this will require some money to get started.