Mood: The mood of the video appears to be energetic and playful, with a hint of nostalgia. The use of remixes and a medley of popular songs suggests a fun and lively tone. The theme seems to be a musical compilation or a mashup of popular Bollywood songs.

Environment: The setting of the video is likely a studio or a music production environment, given the presence of a song medley and a logo of a music label (T-Series). The background is blurred, but it appears to be a bright and colorful setting, which adds to the energetic mood of the video.