Cool to see this mantis shrimp in the wild. I have a very small 3" mantis that I collected in the Florida Keys. But it's just all brown and very shy. But it has doubled in size in the 20 months that I have had it in my tank.
Its definitely staged but fun nonetheless what they do.
O. scyllarus's varying leopard patterns give it away these weren't all using the same specimen, the later individual being much younger than the ones from in the burrow.
Those didn't look like crabs native to their range but I could be wrong on that, they're ghost crabs.