Mood: The mood of the video appears to be energetic and playful, with a theme of carefree attitude and confidence. The title 'Chal Koi Baat Nahi' roughly translates to 'Come on, no problem', which suggests a lighthearted and casual vibe. The overall theme seems to be about embracing a carefree spirit and not worrying about what others think.

Environment: The environment/setting of the video seems to be a stage or a performance setting, likely a music concert or a singing competition. The green background and the man's attire suggest a lively and vibrant atmosphere. The presence of a microphone and the man's posture indicate that he is performing or about to perform a song.