Mood: The mood of the video appears to be melancholic and introspective, with a sense of longing. The theme seems to be related to love or heartbreak, given the title 'KAISE MUJHE TUM' which translates to 'How I Miss You'. The overall emotion evoked is one of yearning and nostalgia.

Environment: The setting of the video seems to be a dimly lit room or stage with a warm and cozy atmosphere. The presence of a microphone and string lights in the background suggests that the video may be a musical performance or a music video, possibly filmed in a studio or a live performance setting.