How to change a ”nero movie maker” file into a file that youtube will accept?

Question by Lilje: How to change a ”nero movie maker” file into a file that youtube will accept?
Me and my friend just made a video recording and we want to put it on Youtube. I edited with nero ”make a movie.” I tried to put it on Youtube but it could not do it for some reason. It did not accept the file. How can I edit the file so that I can put it on Youtube the right way?

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