Mood: The mood of the video appears to be romantic and nostalgic, with a hint of drama and intensity. The theme seems to revolve around love and relationships, possibly set against the backdrop of a bustling city like Mumbai. The overall emotion evoked is one of longing and passion.

Environment: The setting of the video seems to be a mix of urban and possibly rural or historical locations, given the reference to 'Once Upon A Time in Mumbaai', which suggests a Mumbai setting. The environment could range from the vibrant streets of Mumbai to more intimate, personal spaces where romantic moments unfold.