The video shows a close-up of a dog's mouth with its teeth visible. The dog is being given an injection in its mouth by a person wearing gloves. The person is holding a syringe and is injecting the dog with a clear liquid. The dog's mouth is open, and its tongue is visible. The person is wearing a white glove on their left hand and a blue glove on their right hand. The syringe is being held in the person's right hand. The dog appears to be calm and cooperative during the injection process.