It's not that the SVP can't be started as an application but it's that it doesn't "inject" itself into mpv and no interpolation is done. In the log there is only 1 error: Playback [1cc060e0]: VS - Could not initialize VapourSynth scripting.
The person here https://gist.github.com/tomkabel/d3d05d … 6773735463 apparently has a solution but it's a bit over my head. Can someone smarter then me pls help?