Mood: The mood of the video appears to be light-hearted and playful, with a dash of humor. The theme seems to revolve around friendship or camaraderie, given the title 'Hey Bro Birju' and the casual, banter-like poses of the individuals. The overall emotion exuded is carefree and entertaining.

Environment: The setting seems to be a stylized, indoor environment, likely a studio or a specially designed backdrop. The presence of a large, tufted couch and the colorful smoke effects in the background suggest a playful, music-related or comedy-related setting. The video might be a song, a comedy skit, or a fun, dance-related content.