Mood: The mood of the video appears to be behind-the-scenes and making-of a film, likely a thriller or drama. The theme seems to revolve around the transformation of a character, possibly a fan or an obsessive follower, given the title 'FAN'. The emotions conveyed are those of intrigue, curiosity, and possibly a sense of unease or tension.

Environment: The setting appears to be on a film set or a location shoot, with varied backdrops including what seems to be a store or shop, an outdoor area with a railing and greenery, and an indoor setting with a mirror or reflective surface. The environments suggest a mix of urban and possibly suburban or natural settings.