Mood: The mood of the video appears to be nostalgic and celebratory, as indicated by the 'REWIND' label and the year '2016'. The theme seems to be a recap or a summary of events, music, or popular culture from 2016, likely focusing on the Indian entertainment industry given the T-Series branding.

Environment: The environment or setting of the video seems to be a digital or virtual space, possibly a music or entertainment platform. The dark background with a pattern of triangles and the use of HD video suggest a modern, tech-savvy context. The overall aesthetic is sleek and promotional, hinting at a curated selection of content.