Mood: The mood of the video appears to be lively and energetic, with a sense of celebration and romance. The theme seems to revolve around love, dance, and possibly a dramatic or intense storyline given the title 'Once Upon A Time In Mumbaai'. The overall emotion exuded is one of excitement and passion.

Environment: The setting appears to be a vibrant and colorful nightclub or dance hall, possibly in Mumbai, given the title 'Once Upon A Time In Mumbaai'. The background is filled with people dancing and having fun, suggesting a lively and crowded atmosphere. The lighting is dim and colorful, with flashes of bright lights adding to the energetic ambiance.