Why does my Video Say: Your Video has failed to an Unknown error on Youtube?

I'm trying to upload a video to youtube. Heres the Facts: I took the videos from my camera using Quicktime, and I had to convert them to to WMV. File, which only lasts 24 Hours. I made it into a movie and published it, and tried to upload it to Youtube and it says your video has failed to an unknown error! Its only about 5 minutes long! Please Help! :(