The problem is that it is not possible to center 180° 3D (online) video images on the floor or ceiling of the room.
Image centering (by holding the button on the controller or menu) 3D video 180° is possible only in a circle (horizontal axis). Centering the image along the vertical axis in 3D video 180° --- is not possible at all!!
Tried through Meta Quest Browser, Firefox Reality, YouTube VR...
On Oculus GO, this worked only in GizmoVR (the built-in browser), but for Quest 2, this application is not available in the store.
Why is it so difficult to do this? (question to developers)