Mood: The mood of the video appears to be romantic and affectionate, with a warm and intimate atmosphere. The theme seems to revolve around love and relationships, with the title 'Sun Sajni' suggesting a term of endearment. The overall emotion conveyed is one of closeness and tenderness.

Environment: The setting of the video is not explicitly clear, but based on the couple's attire and the overall aesthetic, it seems to be a modern, possibly urban or indoor setting. The dark background with a subtle gradient effect adds to the romantic ambiance.