You can include all types of files within your animation, and easily edit them. Photographs, buttons, text boxes, video, sound... just a few clicks and gestures with the mouse and you can include and edit all of these elements.
Once you've finished your animation - which could be as simple as blinking text, or as complicated as a complete cartoon series - all that's left is to export your work. You have several options: HTML, video, and even GIF format.
Hippo Animator is an interesting tool for two reasons. First: it's very powerful and can be used to make spectacular projects. And second: it's so easy to use that you can complete simple projects in just a few minutes.