So sorry I did not see the video originally.🙁. Just seeing it for the first time now. I guess you added after I saw your post the first time.
Mine did this for the the first day as well, then she gradually got better. He does not appear to be suffering in the video. Looks like he is trying to...
So sorry☹️
Unfortunately there’s not much you can do except supportive care. I had a similar situation with my silkie/polish cross that also has a vaulted skull. She was hit hard in the head by one of my “mean girls“ when I was trying to integrate them and she ended up on her back flailing...