Mood: The mood of the video appears to be nostalgic and celebratory, with a classic theme. The use of black and white images and gold confetti suggests a sense of timelessness and festivity. The title 'THE ARIJIT SINGH CLASSIC MASHUP' implies a collection of popular songs by the renowned Indian singer Arijit Singh, which may evoke feelings of romance, love, and longing.

Environment: The environment or setting of the video seems to be a mix of various scenes, possibly from music videos or films featuring Arijit Singh's songs. The images appear to be from different eras and settings, but mostly show people in emotional or romantic situations. The overall setting seems to be a virtual or digital one, with the images and text overlaid on a black background.