Mini Movie Filesize

Hey, I've been a bit of a lurker here for a while, just looking at all the lovely tutorials. However, lately I've been trying to learn about mini-movies and how to create them in icons. Everyone else these days knows how to make animated icons and I want to learn, too. :)

So, I'm using Movie Maker to take snippets of files and bringing them into ImageReady. I'm still not really good yet and this is my first icon:



The problem is, the filesize is too big (>80KB). I know there are a lot of layers, but for the movie to play right I needed them there. Does anyone know how to cut down on the filesize? Or perhaps know a more effective way to use ImageReady to create mini-movie icons? The memories really confused me, so I hope this post is not a problem for anyone. Oh and how do I lighten up the movie as well without having to do each frame at a time... if it is possible.

Thanks in advance!