I doubt their box has AV1 support, so this is a non-solution.

If it’s only there like in KDE Neon, I’m fine with it. I don’t want any of my distro apps to come as Snaps though.

Who said that?

Many major enhancements to transcoding and playback, including support for software tonemapping of HDR10, HLG and DoVi, preliminary support for DoVi Profile 10, support for Dolby AC-4 audio, more stereo downmixing algorithms, QSV device selection, and more! Our FFmpeg is also now based off the upstream FFmpeg 7.0 release for additional features and improvements there.

Does that mean no grey mess anymore when playing HDR files?

I don’t get how you were able to arrive at that conclusion by looking at the console output, but sure, why not.

I’d say it’s time for a clean install and thinking of a new root password.

Huh? What has that to do with a possibly failing drive?

completely off track

Let’s see how things evolve before declaring things like that.