The same dogs who adorably failed to grasp a magician's sleight-of-hand are back, and this time, they're being subjected to a voice actor speaking to them "in dog." Whether the human barking "means anything" is basically irrelevant, because someone is making noise.
This video does raise some incisive scientific questions about human-canine communication, though. For example, "Where did they find a quiet chihuahua?" and "Can I adopt Tuutikki? Please?"