Mood: The mood of the video appears to be celebratory and nostalgic, with a focus on music and tribute. The use of the phrase 'BIRTHDAY SPECIAL' suggests that the video is a special tribute to Arijit Singh on his birthday. The overall theme seems to be a musical celebration of Arijit Singh's superhit songs.

Environment: The environment or setting of the video seems to be a concert or a music performance setting, likely a stage with a microphone and possibly musical instruments. The background is a pinkish-red color with a textured effect, giving it a vibrant and energetic feel.