Aw, bless its heart. Hopefully, it just needs a little longer to get its land legs. Sometimes, ones that I've had to help out, took a couple days to be ok.
Aww poor baby , hopefully he will straiten him self out soon , if it was me Id probly end up with a cleavage baby , I carry them around everywhere with me when there sickly alot of the time so I have minute by minute reports on how they are. Some times it really helps and some times it dosnt. It also stay the perfect temp
I had a china gosling do the same thing- flipping and couldn't walk steadly on its own. I found that every time I dunked its beak in water for a small drink it did way better and would stand and walk almost steadly for a while. Then, after a few hours, it would do the same again and I would give it another drink by sudmersing its beak in the waterer. It took 3 days of flipping and watering. All in all, it made it and is my absolute favorite gosling. I think it was dehydrated... but all of the handling to flip it back over and give it a tiny sip of water really made it imprint well. It does still definately seem a little, ok a lot, stunned but thats what makes it my favorite. I wish I had that experience last spring when one of my early bronze poults did EXACTLY the same thing in your video. He didn't make it either. I should have given him some tiny drinks of water I think.
I had one that hatched a couple of weeks ago that I found lying on it's side and gasping. i just knew it wasn't going to make it. I mixed up some fresh water with a little apple cider vinegar and molasses in it and dipped his beak about 3 times every few hours. Now he runs straight to my hand strutting when I place it in the brooder. We found him in the floor today after he flew out of the brooder.