You’ve probably been wowed by some sites that have storytelling animations on their homepage. It’s a great way to captivate your viewers and tell your story far more effectively than with a plain, static page. Here are some sites that enable you to create animations:
I recommend visiting each of these sites. You get a feel for the style of their animation pretty quickly.
Online Video Editing
YouTube has some recommendations for online video services: http://www.youtube.com/create