Movie is not uploading to YouTube

Original title: My movie isn't uploading. Help!

I've been uploading movies from Windows Movie Maker to YouTube for the past 2 days. But this one video refuses to upload. Now, the other videos, when I clicked the button to upload them, began a roughly 50 minute saving process, and then began a roughly 5 minute publishing process. I tried to upload this video several times, each time at a progressively lower resolution. It kept finishing the save process but never published; it just closed the bar that told me it was saving. Finally I clicked on "save movie", and it began the 50-minute save process again. I then closed Movie Maker and then opened up the second copy of the movie, which was suspiciously blank. Movie Maker said it was upgrading the quality of the movie, so I waited. When it was finished, the slides were just gray with a picture of a film reel in the bottom left hand corner, but the movie was still on the left side when I played it. I then closed out and opened the original copy, which looked fine. So, I gave the save another shot. Almost an hour later, it said that the movie had not been published successfully because of a bad network connection. I was connected to the internet the whole time. I had had this problem occur before, and I simply re-published the video and it worked. So I tried to publish again, but with the same result. I've tried everything I can think of, so I need some help.