Mood: The mood of the video appears to be romantic and nostalgic, with a hint of melancholy. The theme seems to be a musical rendition of a popular Bollywood song, with a focus on love and longing.

Environment: The setting appears to be an urban environment, possibly Mumbai, given the reference to 'Once Upon A Time In Mumbaai' in the top-right corner. The background features a cityscape with buildings, power lines, and streetlights, creating a sense of urban grittiness.