Export Function is confusing
When I had YouTube selected as the Destination for the finished file, it rendered, but then the file didn't appear on my YouTube channel or anywhere else I could see. I went through the Export step again selecting a local destination, it rendered and popped up in the destination.
In general I found Exporting/Sharing confusing because once it's rendered, it appears as if selecting Done is the only course forward, but that takes you back a step to the Export step where you are asked to select a Destination etc. It never seems to go to the Publish step.