Mood: The mood of the video appears to be lively and celebratory, with a theme of friendship and camaraderie. The presence of a large group of men dancing and having fun suggests a joyful and festive atmosphere, likely centered around a birthday celebration.

Environment: The environment seems to be a vibrant and lively party setting, possibly a nightclub or a large event space. The neon sign in the background with the hashtag 'BhaiKaBir' suggests a modern and trendy location, likely in an urban setting.