Migrating Video to Stream - when and how often do updates happen during migration?

A couple of extra findings during testing:

1. The updates from Video to Stream happen quite often. I have updated titles and descriptions of videos, added new videos, created new channels, ++.
2. Most things seem to work in general, except for one thing that I still haven't figured out: after the sync has picked up the changes, the changed videos move from published to draft state in Stream, and I simply cannot find out how to publish them! This effectively means that the videos that were visible after the initial migration get put in draft mode, unavailable to all other than the video owner, and since Stream is read only until validation period is over we seem to be stuck.
   1. The only place to find these videos in Stream is under My content -> Videos - but only for the owner. There is a Publish button, but it cannot be clicked.