I'm getting ready to attend a workshop so posting might be a bit spotty for a few days. Tech Smith is the company that creates screencasting and recording software.
They do have a web series called The Forge on YouTube that talks about their various software products, best practices and creative ideas that can be used with their products.
I bring this up because in the above video is a talk with presentation guru Cliff Atkinson. If you are trying to explain or persuade an audience this is the guy to spend time with and get a grip on the techniques. He works primarily with PowerPoint but any form of presentation will benefit from his guidance.
There are also a talk about using tablets to record video via iOS and Android devices. It is just an overview but good info.