I am using a Microsoft Surface Pro 4 which runs Windows 10.
I have successfully made the movie and it is approx 1 Gb in size. I wanted to make it again in a size suitable to upload to Facebook.
When I select Upload it to Facebook I am presented with a window asking me to log-in to Facebook. That is followed by a new window announcing "Success" but that then vanishes and nothing happens!
I had no problem making a video and uploading to Facebook a month or so ago before I upgraded from v 11.0 to 13.0.
I have tried with a small clip and same result. I have tried using my older version but it says no, I must use newer installed version.