Mood: The mood of the video appears to be romantic and adventurous, with a sense of thrill and excitement. The couple on the jet ski seems to be enjoying a fun-filled moment together, conveying a sense of freedom and joy. The theme of the video may revolve around a romantic relationship, with the title 'Koi Jaane Na' suggesting a sense of secrecy or mystery.

Environment: The setting of the video appears to be a beautiful, serene body of water, likely a lake or a sea. The presence of a jet ski and the calm waters suggests a warm and sunny day, perfect for a fun-filled adventure. The environment seems to be peaceful, yet energetic, with the couple's excitement and thrill adding to the ambiance.