Mood: The mood of the video seems to be melancholic and introspective, with a hint of longing. The theme appears to be related to love, heartbreak, or separation, as suggested by the title 'Kahin Mat Jaana' which translates to 'Don't Go Away'. The overall emotion conveyed is one of yearning and desperation.

Environment: The setting of the video seems to be a stylized, modern urban environment, possibly a rooftop or a studio, given the presence of the guitar and the stylish attire of the protagonist. The bold, vibrant color scheme and graphic illustration style suggest a creative, artistic approach to the video.