Mood: The mood of the video appears to be romantic and intimate, with a focus on love and longing. The images of the couple embracing and the solo shot of the male singer with a passionate expression suggest a strong emotional connection. The overall theme seems to be a musical tribute to love, with the title 'Tum Hi Ho' implying a deep affection or devotion.

Environment: The environment or setting of the video is not explicitly shown, but based on the images, it appears to be a mix of indoor and possibly outdoor settings, given the varied backgrounds and lighting. The black and white filter on one of the couple's images adds a touch of nostalgia or timelessness, while the color images provide a more contemporary feel.