Mood: The mood of the video appears to be lively and carefree, with a sense of youthful energy. The theme seems to revolve around friendship, camaraderie, and possibly romance, given the title 'Harry is not a Brahmachari', which suggests a playful take on traditional Indian values. The overall emotion conveyed is one of joy and celebration.

Environment: The setting appears to be a vibrant and trendy nightlife environment, possibly a club or a party. The presence of bright lights, a crowd, and people dressed in casual, modern attire supports this inference. The purple and pink hues suggest a dynamic and lively atmosphere.