Mood: The mood of the video appears to be romantic and nostalgic, with a sense of longing. The theme seems to revolve around love and separation, as hinted by the title 'Sajan tum bin'. The overall emotion conveyed is melancholic yet hopeful.

Environment: The setting of the video seems to be a scenic outdoor location, possibly a mountainous region with a winding road. The background features a sunset or sunrise, indicated by the warm hues of the sky. The natural beauty of the surroundings adds to the romantic ambiance of the video.