Hey Martin,
I have exactly the same issue but in premiere pro 2023 (23.2.0 build 69).
My specs are the same but i have 3060 GPU. It’s legion 5 pro 2022
I wonder if you have same laptop because of the specs and 16:10 video you posted. Maybe this problem is exclusive to legion 5 pro because i haven’t found anything about this problem anywhere else.
It’s been a long time since last post. Have you figured out how to fix this?