v4.0.529

## What's Changed

- [`@remotion/motion-blur`: Add HTML-in-canvas-based motion blur!](https://remotion.dev/docs/motion-blur) by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11601
- [`@remotion/paths`: Add `interpolatePaths()` and make paths interpolateable in Studio](https://remotion.dev/docs/paths/interpolate-paths) by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11581
- `@remotion/media`: Fix `VideoSample` leak when `<Video>` unmounts during a seek by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11640
- `remotion`: Distinguish timeline seeks from playback frame updates by @samohovets in https://github.com/remotion-dev/remotion/pull/11638
- `@remotion/compositor`: Prepare for faster shared-memory rendering by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11637
- `@remotion/studio`: Replace title tooltips with accessible names by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11610
- `@remotion/studio`: Darken transparency checkerboards to match Studio background by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11617
- `@remotion/studio`: Fix checkerboard bleed in scaled previews by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11619
- `@remotion/studio`: Show longer timeline labels when property chevron is hidden by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11635

## Elements

- Separate guidelines from gallery contributions by @samohovets in https://github.com/remotion-dev/remotion/pull/11626

## Docs

- Explain timing and trimming for sequences and media by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11603
- Change llms.txt to a documentation index by @samohovets in https://github.com/remotion-dev/remotion/pull/11628
- Put page-level version badges in titles by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11629

## Internal and Experimental

- Internal testbed: Add Html5Video option to simultaneous playback composition by @samohovets in https://github.com/remotion-dev/remotion/pull/11618
- `template-vibe-code`: Add browser-based motion graphics editor template by @JonnyBurger in https://github.com/remotion-dev/remotion/pull/11636

**Full Changelog**: https://github.com/remotion-dev/remotion/compare/v4.0.528...v4.0.529