That's a good point... she was probably still warm from being outside when I took the video. I think she was stressed out being inside, too. She spent the day complaining and bokking for the other chickens.If she hangs the other one, that just usually means they are warm.
Could she have jumped off of a high roost and injured the leg?
She definitely could have jumped off of a high roost... and landed on the brick the watering contraption sits on. Or, she could have landed on the awkwardly bent wire that is buried (to prevent digging predators) and curved (but not quite flush) with the foundation. Or, she could have landed on the foundation. I moved the brick.
Another video of limping, this time without the wings hanging