fix(skills): say a video carries its own data-start, not its wrapper

skills/hyperframes/SKILL.md

@@ -24,7 +24,7 @@ Build what was asked: no voiceover or captions and no new aspect ratio unless th
 5. Never tween `display`, `visibility` or `autoAlpha` on a `.clip`; animate a child.
 6. No CSS `transform` on an element GSAP transforms; animate transforms, not `left`/`top`/`width`/`height`.
 7. Never `play()`, `pause()` or seek media. A `<video>` keeps its sound with `data-has-audio="true"`, else it is `muted`; music, voice, replacement sound and J/L cuts are a separate `<audio>`.
-8. Every `<audio>` has an `id` or it is left out of the mix. No `crossorigin` on media. Time a `<video>` or its wrapper, never both.
+8. Every `<audio>` has an `id` or it is left out of the mix. No `crossorigin` on media. Time the `<video>`, never its wrapper.
 9. Only the bundled fonts (`references/format.md`) resolve by name; any other family needs `@font-face` to a file in `assets/fonts/`.
 10. Asset paths: `assets/...` (no leading `/`), in sub-compositions too.
 11. Grades, grain, blur and vignettes on footage go through `npx hyperframes media-treatment` (`/media-use`), never CSS filters.

skills/hyperframes/references/format.md

@@ -146,7 +146,7 @@ Studio's Detach audio writes a muted `<video>` and an `<audio>` of the same file
 | `video_missing_muted`                                  | A timed `<video>` gets `data-has-audio="true"` or `muted`                                              |
 | `gsap_css_transform_conflict`                          | Set the start inside the tween (`gsap.fromTo`) instead of a CSS `transform`                            |
 | `gsap_animates_clip_element`                           | Animate a child of the `.clip`, or its `opacity`                                                       |
-| `video_nested_in_timed_element`                        | Time the `<video>` or its wrapper, not both                                                            |
+| `video_nested_in_timed_element`                        | Keep `data-start` on the `<video>`; leave its wrapper untimed                                          |
 | `media_missing_id`, `media_crossorigin_breaks_preview` | Give every `<audio>` an `id`; drop `crossorigin`                                                       |
 | `gsap_timeline_registered_before_async_build`          | Register the timeline at the end of the async callback                                                 |
 | `standalone_composition_wrapped_in_template`           | Only scene files use `<template>`                                                                      |