Mood: The mood of the video seems to be nostalgic and sentimental, with a hint of melancholy. The theme appears to be related to relationships, friendship, and the passage of time. The title 'Duniya Kaisi Lagti Hai' roughly translates to 'What does the world look like?', which suggests a reflective and contemplative tone.

Environment: The setting of the video appears to be a beach at sunset, with the silhouettes of three people walking hand in hand. The warm orange glow of the setting sun and the serene atmosphere of the beach suggest a peaceful and serene environment.