Well what I see is one duckie has his leg slightly out but is able to use it, the other one stays completely laying down doesn't use the leg at all, but is able to move his toes. It's the one laying down that I would be concerned about, the other with the leg to the side looks like he'll be OK.. unless the one laying down is the only one we are talking about?? LOLNo just one, I just notice that one is MUCH worse than the other... perhaps the video didn't show that or your confused following the one with the leg issue. One of them barely uses one of her legs and scoots along sometimes.
if so, still I don't think it's broke.