Ok now that i ahve made a movie by putting most of my replays in a mpeg file in a movie and have music in it idont know how to upload it to youtube because its a MSWMM file and it doesnt take that kind so how can i convert it to another thing like a MPG MPEG or like a AVI

I forgot to say that everytime i try to play the movie it says not enough storage to process command which is just play and i dont understand wht is wrong

And when i try to save movie file as a AVI it only goes to 3% and stops and says "Windows Movie Maker cannot save movie to specified location.Verify that the origanal source file used in your movie are still available, that the saving location is still available, and that there is enough free disc space available, and then try again." what should i do