Mood: The mood of the video appears to be youthful, energetic, and possibly rebellious. The theme seems to revolve around school life, friendship, and youthful angst. The presence of a song title 'Le Chhalaang' suggests that the video might be a music video or a promotional material for a movie or series that features a popular song.

Environment: The setting appears to be a school or a location that resembles a schoolyard, with a red brick wall and a tree in the background. The boys are dressed in school uniforms, which further supports this inference. The atmosphere seems casual and relaxed, with the boys sitting and standing in a seemingly informal arrangement.