In this video, a person is seen holding a small bottle of liquid and pouring it into the mouth of a black dog. The dog appears to be enjoying the liquid as it licks it up. The person then proceeds to rub the dog's teeth with their fingers, possibly to clean them. The dog seems to be cooperative throughout the process. The video provides a close-up view of the interaction between the person and the dog, highlighting the care and attention given to the dog's dental hygiene.