After reading Hillman Curtis's great book "Flash Web Design", I too started experimenting with using Movies in my animations. And anyone who has any interest in it can too. You don't even need a video camera at all. Just go to the web and download some royalty free QuickTime Movie clips (for free) and add them to your animation. So, below you'll see an example I did by using QuickTime 4's Sample Movie.
My name is Kirupa Chinnathambi...hence the name kirupa.com. I'm the founder, webmaster, designer, lead tester, editor, content creator, creative director, animator, sound guru, flashguy, server maintenance, support staff, janitor, and a billion other responsibilities that will creep up on a site as successful as Kirupa.com.