But I still have some issues / questions..

First, in your movie, ubiboot shows after about 10 seconds. Mine takes about 25 seconds... What could cause this?

How can I see what kind of open mode I have? I saw some different versions / methods? How can I check what I have and if it is the right version / way.

For now, at the moment I don't have much time to test. But I will try to do my best and give feedback.