Mood: The mood of the video appears to be romantic and melancholic, with a sense of longing. The title 'Humko Deewana Kar Gaye' translates to 'You Have Made Me Crazy', which suggests a theme of love and obsession. The expressions on the faces of the two leads convey a sense of intensity and passion.

Environment: The setting of the video seems to be an urban or indoor location, possibly a train or a station, given the metal doors and compartments visible in the background. The blurred background and the focus on the two leads suggest that the video may be a dramatic or romantic sequence from a Bollywood film.