Mood: The mood of the video appears to be melancholic and nostalgic, with a hint of longing. The title 'Chandni Tu Hai Kahan' suggests a sense of yearning and searching. The overall theme seems to be a romantic and introspective one, possibly exploring the emotions of love, loss, and separation.

Environment: The setting of the video is not explicitly clear, but based on the woman's attire and the background, it appears to be a rural or natural setting, possibly in the Indian countryside. The blurred background and the woman's traditional clothing suggest a classic or retro aesthetic.