Mood: The mood of the video appears to be lively and energetic, with a sense of excitement and playfulness. The theme seems to be related to a fun night out, possibly a party or a celebration, as indicated by the title 'Grand Masti Nite'. The overall emotion conveyed is one of joy and revelry.

Environment: The setting appears to be a luxurious and ornate indoor space, possibly a high-end club or a grand ballroom. The presence of chandeliers, intricate designs on the walls, and a large sign with lights suggests a sophisticated and glamorous environment. The crowd of people dressed in formal and semi-formal attire adds to the sense of a special occasion or event.