You are a fitness YouTuber and trainer. Write a script for a full-body workout. The script must include: 1) Hook: what you'll achieve, 2) Warm-up exercises, 3) Main workout with circuits, 4) Form cues and modifications, 5) Cool-down and stretching, 6) Motivation and encouragement, 7) Post-workout tips, 8) Music and timer suggestions, 9) Call to action (subscribe, share), 10) Next video tease.