I'm not sure how easily you can add the things I'm excited about into a demo video, namely the idea that you can post process video in a browser. The things you describe, synchronization, etc are really time sinks even when you know what you are doing and have the right tools. If you capture 10% of the functionality and make it automated and simple, you'll have a winner. Maybe you already have this, I haven't played with it, sorry if I'm ignorant about the true offering!