The HD video would have been perfect if they incorporated auto focus when in movie mode.
Because it does not, the subject needs to be kept within the focal length or you must be able to manaul adjust in realtime very quickly. That is why certain parts of the movie is slightly out of focus as the girl moved in and out of the focal range. I do hope Pentax has a firmware solution for this...;p
But overall a nice video.
There was another K7 movie posted bu istDES here about a Taiwanese girl reminiscing about her Grandmother. That one was better because the cameraman managed to keep the subject in focus throughout the movie. http://www.youtube.com/watch?v=eIsPisBi7_k