Mood: The mood of the video appears to be romantic and intimate, with a sense of longing. The theme seems to revolve around love and heartbreak, as hinted by the title 'Heartless' and the closeness of the couple. The overall emotion exuded is one of tender affection.

Environment: The setting seems to be a warm and cozy indoor environment, possibly a room with a plain background. The lighting is soft and golden, which adds to the romantic ambiance. The couple's attire suggests a casual yet elegant setting, possibly a home or a private space.