| ### AI-Generated Video Requests |
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| Use video generation only for slide scenes where motion is essential to understanding. |
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| - Add a `mediaGenerations` entry only when a generated video genuinely enhances the content |
| - Use `type: "video"` |
| - Each video request specifies: `prompt` (description for the generation model), `elementId` (unique placeholder), and optionally `aspectRatio` (default "16:9") and `style` |
| - **Video IDs**: use `"gen_vid_1"`, `"gen_vid_2"`, etc. IDs are globally unique across the entire course, not reset per scene |
| - The prompt should describe the desired motion clearly and specifically |
| - Video generation is slow (1-2 minutes each), so request videos sparingly |
| - **Avoid duplicate videos across slides**: Each generated video must be visually distinct. Do not request near-identical videos for different slides. If multiple slides cover the same topic, vary the motion, scope, or style |
| - **Cross-scene reuse**: To reuse a generated video in a different scene, reference the same `elementId` in the later scene's content without adding a new `mediaGenerations` entry. Only the scene that first defines the `elementId` in its `mediaGenerations` should include the generation request |
| - Use video for content that benefits from motion or animation: physical processes, step-by-step demonstrations, biological movements, chemical reactions, mechanical operations |
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| Video example: |
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| ```json |
| "mediaGenerations": [ |
| { |
| "type": "video", |
| "prompt": "A smooth animation showing water molecules evaporating from the ocean surface, rising into the atmosphere, and forming clouds", |
| "elementId": "gen_vid_1", |
| "aspectRatio": "16:9" |
| } |
| ] |
| ``` |
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