Mood: The mood of the video appears to be lively and celebratory, with a sense of romance and playfulness. The theme seems to revolve around a wedding or a festive occasion, with the title 'Tanu Weds Manu Returns' and the song title 'Mari Gali' suggesting a connection to a romantic comedy or a musical romantic drama.

Environment: The setting of the video appears to be a vibrant and colorful wedding reception or a festive party, with purple and pink lights, and a decorated backdrop. The presence of a woman in a traditional Indian dress and a man in a suit suggests a blend of modern and traditional elements.