Mood: The mood of the video appears to be energetic and celebratory, with a hint of playfulness. The use of bright colors, particularly green, and the stylized illustration of the person's face suggest a lively and vibrant tone. The text 'Lovely Star' implies that the video may be a tribute or a fan-made content, possibly related to a celebrity or a music video.

Environment: The environment or setting of the video is not explicitly shown, but based on the illustration style and the color scheme, it could be inferred that the video is set in a modern, urban or pop culture-inspired context. The green background with yellow streaks gives a sense of dynamism and movement.