Mood: The mood of the video appears to be romantic and dreamy, with a sense of longing. The theme seems to revolve around love and possibly unrequited love, as hinted by the title 'Kaun Hai Jo Sapno Mein Aaya' which translates to 'Who is it that came in my dreams'. The emotions conveyed are tender and affectionate.

Environment: The setting of the video seems to be outdoors, possibly in a rural or desert-like area, given the vast expanse of sand or wheat-like field in the background. The sky appears to be overcast or at dawn/dusk, adding to the romantic ambiance. The environment suggests a natural, serene backdrop for a romantic song.