Mood: The mood of the video appears to be dark and intense, with a sense of foreboding. The theme seems to revolve around the darker aspects of life in Mumbai, as hinted by the text 'THE DARK SIDE OF LIFE'. The overall emotion conveyed is one of seriousness and possibly even menace.

Environment: The setting of the video seems to be urban, likely Mumbai, given the title 'Mumbai City'. The background, composed of numerous small images of people, suggests a crowded and possibly chaotic environment. The presence of four prominent male figures suggests that the video could focus on their stories or experiences within this setting.