Mood: The mood of the video appears to be light-hearted and carefree, with a sense of joy and freedom. The theme seems to be related to love, relationships, or personal growth, given the title 'Jab Jana He Tha' which translates to 'When I Had to Go'. The overall emotion conveyed is one of nostalgia and longing.

Environment: The setting of the video appears to be outdoors, possibly in a park or a forest during the autumn season, given the orange and yellow leaves in the background. The natural setting and the woman's casual attire suggest a relaxed and casual atmosphere.