docs(compose): drop three motion demo clips

jobs/compose.mdx

@@ -103,7 +103,7 @@
 </CodeGroup>
 
 <Info>
 **Assets:** video, image, text, audio, composition · **Output:** mp4 / webm / gif / mp3 (audio only) / jpg / png (still frame)
 </Info>
 
 That is the shape of every render. Everything below is one more clip, one more track, or one more field.
@@ -204,20 +204,9 @@
 
 `transform` positions, scales, and rotates a clip. Add `animateTo` for a Ken Burns move, or scale a clip down and place it on an overlay track for picture-in-picture. `speed` is a playback multiplier: below `1` for slow motion, above `1` for a timelapse.
 
-<Columns cols={2}>
-  <Frame caption="Ken Burns: bring a still photo to life (transform.animateTo)">
-    <video src="https://cdn.rendobar.com/assets/showcase/fx/kenburns.mp4" autoPlay loop muted playsInline controls />
-  </Frame>
-  <Frame caption="Picture-in-picture webcam (transform.scale)">
-    <video src="https://cdn.rendobar.com/assets/showcase/fx/pip-webcam.mp4" autoPlay loop muted playsInline controls />
-  </Frame>
-  <Frame caption="Slow motion (speed: 0.4)">
-    <video src="https://cdn.rendobar.com/assets/showcase/fx/slowmo.mp4" autoPlay loop muted playsInline controls />
-  </Frame>
-  <Frame caption="Timelapse (speed: 3)">
-    <video src="https://cdn.rendobar.com/assets/showcase/fx/timelapse.mp4" autoPlay loop muted playsInline controls />
-  </Frame>
-</Columns>
+<Frame caption="Picture-in-picture webcam (transform.scale)">
+  <video src="https://cdn.rendobar.com/assets/showcase/fx/pip-webcam.mp4" autoPlay loop muted playsInline controls />
+</Frame>
 
 ### Compositing
 
@@ -326,13 +315,13 @@
 
 | Field | What it does |
 | --- | --- |
 | `opacity` | `0`..`1`, or keyframes `[{ time, value, easing: step \| linear \| smooth }]` |
 | `transform` | `position {x,y}`, `scale`, `rotate`, `anchor` (`center` \| `topLeft`), `fit` (`contain` \| `fill`), `animateTo` (Ken Burns end state) |
 | `crop` | `top` / `right` / `bottom` / `left`, each a percent string like `"10%"` |
 | `speed` | playback rate (`0.5` = slow motion, `2` = fast, and pitch shifts with speed) |
 | `color` | `brightness` (-1..1), `contrast` (0..4), `saturation` (0..3), `gamma` (0.1..10), `hue` (-180..180), `temperature` (1000..40000 K) |
 | `filter` | `greyscale`, `negative`, `boost`, `muted`, `lighten`, `darken`, `contrast` (mutually exclusive with `color`) |
 | `blur` / `sharpen` | gaussian blur strength / unsharp amount |
 | `chromaKey` | `color` (hex), `similarity` (0..1) |
 | `blendMode` | `normal`, `multiply`, `screen`, `overlay`, `darken`, `lighten`, `add`, `difference` |
 | `pan` | stereo balance, `-1` (left) to `1` (right) |