by Richard van Iwaarden.
My quest continues, as I have found something.
By comparing the 'broken' .mbz with the right .mbz I received this message from 7-zip upon extracting:
This basically says that there's a data-error in this file.
When checking this file, it's a 482 MB video file, a recording of an MS Teams meeting.
Could the filesize be a problem here? Or just the video recording?