Video encoding problem for Firefox on Blender 5 release notes page

On this Blender 5 release notes page: blender.org/download/releases/5-0 See left is Chrome 143, right is Firefox 147: Running the video that's supposed to be looping there directly in another Firefox tab: blender.org/wp-content/uploads/2025/11/sky_multiple_scattering.mp4 it says: "Video can't be played because the file is corrupt :("

That's actually the ONLY video on the page that's acting up! The others seem to be fine! :)

Actually I dunno If this here is the right spot for this. But on the forums it said stuff like this should be here. But I cannot find a matching category 🤷 Cheers folks! ëRiC