Mood: The mood of the video seems intense and dramatic, with a sense of conflict and rivalry. The theme appears to be related to a struggle or a clash between two individuals or groups, with the phrase 'Pick a side' suggesting a sense of allegiance or loyalty. The overall emotion conveyed is one of tension and urgency.

Environment: The environment or setting of the video seems to be dark and gritty, with a cityscape or urban background hinted at. The presence of a crowd in the background suggests a public or communal setting, possibly a protest or a gathering of some sort. The dominant colors of red and blue create a sense of contrast and opposition.