I'm trying to post a home video on youtube.com, which allows you to post videos up to 100MB. When I transfer (or "share") my clip from iMovie to Quicktime format, I only see options for high quality (about 600MB) and CD ROM (about 20MB) and lower. Nothing in between. And, unfortunately, the quality in 20MB is pretty bad. Is there some way to manually choose the resolution? Or, if not, is there another way to get closer to 100MB? The iMovie file is 1.47GB. Any advice would be much appreciated. Thanks.