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 heartache, as suggested by the title 'Heartless' and the couple's close embrace. The overall emotion conveyed is one of tender affection.

Environment: The setting of the video seems to be a casual, outdoor location, possibly during the daytime given the natural lighting. The exact location is unclear, but it appears to be a relaxed, possibly urban or scenic spot.