In "Blink," Sally Sparrow had many pictures of the Weeping Angels in her folder she gave the Doctor later. Here, the Angel on the tape comes to life because "that which captures the image of an Angel becomes an Angel," so the pictures Sally gave the Doctor in "Blink" should have come to life.
When the Doctor is with River and Amy, discussing the Weeping Angels' defense mechanism inside the pod with the looping video screen, he holds onto what appears to be a safety harness dangling from the ceiling. This immediately tears off, and he throws it somewhere out of the way. However, Matt Smith initially did this accidentally, but they decided they liked it and even re-filmed it.