Mood: The mood of the video appears to be somber and reflective, with a hint of defiance. The theme seems to revolve around female empowerment, resilience, and possibly the struggles faced by young girls. The title 'BIG GIRLS DON'T CRY' suggests a narrative that encourages strength and stoicism in the face of adversity.

Environment: The setting appears to be a school or educational institution, as indicated by the uniforms worn by the girls. The background is blurred, but it seems to be an indoor setting with red walls or possibly a bus, given the context of the girls' positioning.