Mood: The mood of the video appears to be dramatic and intense, with a sense of turmoil or conflict. The presence of lightning and the serious expressions on the faces of the two individuals suggest a theme of change, upheaval, or transformation. The title 'Mera Yaar Badal Gaya' translates to 'My Friend Has Changed', which implies a shift in relationships or personalities.

Environment: The environment seems to be a nighttime setting with string lights or lanterns in the background, which could be indicative of a urban or festival setting. The dark background with lightning suggests a stormy or dramatic atmosphere, possibly symbolizing the turmoil or change mentioned in the theme.