Mood: The mood of the video appears to be lively and joyful, with a sense of celebration and festivity. The theme seems to be related to love, romance, and music, given the title 'Ainvayi Ainvayi' and the presence of a couple dancing together. The overall emotion conveyed is one of happiness and togetherness.

Environment: The setting of the video appears to be a vibrant and colorful party or wedding celebration, with a crowd of people in the background cheering and clapping. The red curtains and lights add to the festive atmosphere, suggesting a lively and energetic environment.