Complex sentence: Secrets of the Masters is a short animated film that was released on December 13,2011, as a special feature attached to the "Kung Fu Panda 2" DVD and Blu-ray.
Split into simpler sentences: Secrets of the Masters is a short animated film. It was released on December 13,2011 as a special feature attached to the "Kung Fu Panda 2" DVD and Blu-ray.