This update for havPreviewHandler started with a straightforward goal: show a representative still-frame for MP4 files in both the File Explorer Preview Pane and thumbnails.

While implementing this, it became clear that havPreviewHandler's existing loading pipeline didn't hold up under rapid file switching. Under certain conditions, previews stalled.

To address this properly, the loading system was reworked into an asynchronous pipeline. The result is faster preview updates and a responsive File Explorer experience, even when switching files mid-load.

The changelog for v0.3.0 is short, but the changes behind it are not.

• Added MP4 file support for representative still-frame preview and thumbnail (no video playback)

The update is available in the Downloads section.