Well, I can't see any signs in the video (but I don't think that will get you very far):
The GSV image from 2020 shows perfectly clear signs, so this begs the question of why your wife drove past the signs, does she just not know what they mean?
If there were diversion signs that gives a ray of hope, but we would need specifics, not just a general assertion that there were diversions in the area.
In the meantime I'll get hold of the traffic order.