Mood: The mood of the video appears to be romantic and nostalgic, with a hint of wistfulness. The title 'Kaash Aisa Bhi Din Aaye' translates to 'I Wish Such Days Also Come', which suggests a longing for a past time or a lost love. The overall theme seems to be a musical reflection on love, memories, and the passage of time.

Environment: The setting of the video seems to be a stylized, dreamlike atmosphere, with a blurred background of pastel colors and soft lighting. The presence of a woman in a elegant outfit and a man in a suit jacket suggests a sophisticated and intimate setting, possibly a music performance or a romantic ballad.