What video types will 2003 accept?, Trying to add in my first movie Options

[Lato]

Ok First let me say that I have adobe media encoder which lets me change the file type of the movies I make. I made a movie in Imovie on my mac it was a M4V type and then I changed it to a MPG type cause 2003 said it took AVI and MPG types, it allowed me to import the movie but when it went to run is said there was no support for it. So what types of file do you guys know that works?