I have Premiere Pro 2020 and have been creating and exporting tp you tube for several months. On occasion my videos will not save correctly and therefore I cannot download to you tube. I just created avideo twice and the same result. When I click on my video in my documents it says: Can't play. This file isn't playable. That might be because the file type is unsupported , file extension is incorrect, or the file is corrupt. I am stumpted.