Mood: The mood of the video appears to be romantic and intimate, with a sense of longing. The theme seems to revolve around heartbreak or unrequited love, as suggested by the title 'Heartless'. The emotion conveyed is one of yearning and desire, with the couple's close proximity and gentle facial expressions evoking a sense of tender affection.

Environment: The setting of the video seems to be outdoors, possibly near a body of water, given the dark blue hue and subtle wave patterns visible in the background. The sky above is cloudy, with sunlight peeking through, creating a warm and dreamy atmosphere. The overall setting suggests a serene and picturesque backdrop for a romantic encounter.