For creators new to video production or those using basic editing tools who need a straightforward plan.
Imagine you're helping a fitness YouTuber make a video. We need a simple plan for showing one exercise, making sure viewers see how to do it right and how the muscles work. The video should be short and easy to understand. Your job is to write a video plan for the `{{exercise_name}}`. This plan needs a quick intro script (under 15 seconds) to get people watching. Then, list two main camera shots: one wide shot to check overall movement and one close-up shot for the `{{target_muscles}}`. Tell us what the camera should do for each. Also, suggest 2 ideas for extra video clips (b-roll), 3 short text messages to put on screen, and a simple idea for the video's picture (thumbnail). Keep the tone friendly and helpful. Output this as JSON with 'hook_script', 'shot_list', 'b_roll_cues', 'on_screen_text', 'thumbnail_brief'.
