Mood: The mood of the video appears to be romantic and upbeat, with a sense of joy and happiness. The theme seems to revolve around love and relationships, given the title 'So Gaya Yeh Jahan' which translates to 'This is how the world went' and the context of the couple's intimate moment. The overall emotion exuded is carefree and lively.

Environment: The setting of the video seems to be a nightlife environment, possibly a club or a party, indicated by the purple hue and the presence of blurred lights in the background. The atmosphere appears lively and vibrant, suggesting a fun and energetic setting.