Mood: The mood of the video appears to be romantic and playful, with a hint of humor. The theme seems to revolve around relationships and possibly heartbreak or unrequited love, given the title 'Not Funny'. The overall emotion conveyed is lighthearted and carefree, with a touch of melancholy.

Environment: The setting of the video seems to be a mix of indoor and outdoor locations. The left side of the image has a reddish-pink background, suggesting a nighttime setting, possibly a party or a dimly lit room. The right side has a bright and airy background, indicating a daytime setting, likely outdoors. The contrast between the two settings could symbolize different moods or phases in a relationship.