Because if you have, open windows movie maker and the video in it, in the top left corner it say 'Archive' , click it.
Then you will see that it says Save Project click it, it will take some minutes depending on how long, how slow your connection or computer is. After that try uploading it again.
Then you will see that it says Save Project click it, it will take some minutes depending on how long, how slow your connection or computer is. After that try uploading it again.


