Mood: The mood of the video appears to be light-hearted and playful, with a sense of excitement and energy. The use of bright colors and bold text suggests a comedic or romantic tone. The theme seems to revolve around relationships, possibly sibling or romantic, given the title 'Behen Hog Ter!' which translates to 'You will be my sister!' in English.

Environment: The setting appears to be a casual, possibly outdoor or party-like environment, given the blurred background of people in the distance. The focus, however, is on the two main characters, a man and a woman, who seem to be in a close or intimate setting, possibly a social gathering or a moment of solitude.