There's something odd about the way the arms move, like they are two distinct entities cooperating rather than being part of one coordinated mind. Maybe this is an example of the uncanny valley, or maybe it's because they are two physically separate arms, but it seems to me like one arm moves while the other waits for its turn. It's as if engineers programmed them to work sequentially. I wonder if it might be beneficial for engineers to study videos of humans doing these tasks and try to mimic those movements rather than trying to program a sequential procedure.