Why can't I publish with Windows Movie Maker?

im trying to use Windows Movie Maker to make a 8 minute movie from imported 5 video files from my camera-phone. I needed to add in effects (rotate 270 degrees) because otherwise the video would be sideways. For the last 3 hours I have been trying to publish it to a file type that I can upload to the internet but movie maker keeps freezing. Every time, it gets to 34% and then freezes indefinitely. I have no other programs open and I've told the CPU to devote all resources to Movie Maker via Task Manager-->Processes-->Set Priority-->High. This is more frustrating than you could ever imagine. All I want to do is upload a video to youtube and Movie Maker is preventing that because of stupid technicalities.