"Mittens, that's you!" a voice filming the confrontation says to the cat. "That's you!" echoes the little girl, as she pursues Mittens with a larger, 2-D version of her own image.
Her humans snicker (pretty insensitively), as they pursue her with the portrait, and Mittens loses the blithe, careless attitude for which cats are known.
Self-possession and the ability to sit for hours in silence staring out the window: These are some of the reasons we love them. Their need for naval-gazing is nil.