If the water parameters are good, I wouldn’t worry too much. They are likely just resting and it’s nothing to worry about. I would recommend making sure they have enough places to hide that aren’t in the open, as this behavior normally occurs in their hides, so if it’s in the open like this, it may be a sign they don’t have any other suitable places to rest.
masilla_ 
Did you tell them you’re recording a video not taking pictures?
Honestly they could just be resting, especially if they ate a lot.
Shrimp siesta… shhh 😴
If the water parameters are good, I wouldn’t worry too much. They are likely just resting and it’s nothing to worry about. I would recommend making sure they have enough places to hide that aren’t in the open, as this behavior normally occurs in their hides, so if it’s in the open like this, it may be a sign they don’t have any other suitable places to rest.
their stunning shrimp