Mood: The mood of the video appears to be casual and relaxed, with a hint of playfulness. The theme seems to revolve around relationships or unrequited love, given the title 'Side A Side B' and the overall tone of the images. The emotion conveyed is light-hearted and carefree.

Environment: The setting of the video seems to be a mix of indoor and outdoor locations. One setting appears to be a tropical or subtropical outdoor environment with trees and greenery, while the other setting looks like a modern home interior with a warm lighting. The contrast between the two settings might indicate a narrative that shifts between different environments or states of mind.