The 380 spoiler rise is quite slow, and does not happen straight away. In at least one of the videos that was doing the rounds the spoilers were fully extended when the nose went past the PAPI.
They should start moving as soon as the wheel touch down, it may take a while to get to full extend though. The night landing footage are to hard to really tell when they first move. As mentioned before the lack of lights on the first video are also a give away that the aircraft was still airborne.