Mood: The mood of the video appears to be nostalgic and sentimental, evoking a sense of carefree youth and friendship. The theme seems to revolve around the joy of reliving fond memories, as hinted by the title 'Woh Bhi Din The' which translates to 'Those Were The Days'. The overall emotion conveyed is one of wistfulness and happiness.

Environment: The setting of the video seems to be outdoors, possibly during the daytime, given the bright and sunny background. The presence of a scooter and the casual attire of the individuals suggest a relaxed, informal environment, likely in an urban or suburban setting.