Mood: The mood of the video appears to be melancholic and introspective, with a sense of longing. The title 'Kyu Kho Gaye' translates to 'Why did you go away?', suggesting a theme of separation, loss, or heartbreak. The overall emotion conveyed is one of sadness and yearning.

Environment: The setting of the video seems to be a dimly lit, possibly indoor location with a wooden backdrop. The focus is on the artist, Swati Sharma, who is prominently featured holding a microphone, suggesting a music video or a song performance.