Replace static image with video for auto-edit feature

This change replaces the static image demonstrating the auto-edit feature with an embedded video, providing a more dynamic and engaging visual representation for users.

Author: jdorfman

docs/cody/capabilities/auto-edit.mdx

@@ -16,7 +16,9 @@
 
 Eligible Cody Pro users will gradually be given access to the auto-edit feature. Once you have it, you will receive an in-editor notification.
 
-![Auto-edit demo](https://p21.p4.n0.cdn.zight.com/items/4guL2xzb/6d545dab-e2db-4114-a05e-c54b08e7f0bd.jpg?v=a3673b4b48aed41b1977858f18ba0369)
+<video width="100%" loop playsInline controls style={{ width: '100%', height: 'auto' }}>
+    <source src="https://storage.googleapis.com/sourcegraph-assets/Docs/Media/auto-edit-in-action-2025.mp4" type="video/mp4" />
+</video>
 
 ### Auto-edit access for Enterprise customers