So third time's the charm, I guess? (hey Chainik if you read this again)
So far I got everything to work. SVP uses my graphics card and shows the video in 60fps (only works with mpv for some reason even though I did all the setting changes in VLC 64bit) but now there is no audio.
Other Video players play the video files with sound just fine but don't use SVP so the problems seems to be mvp with vapoursynth support.
I tried to reinstall it, made sure I follow all steps of the guide and looked through the common issues section. MVP without vapoursynth support plays the audio just fine but obviously doesn't work with SVP.
Could this be a problem with vapoursynth or is it a local problem on my computer?
Also what could be the problem that VLC doesn't use SVP even though I checked the SVP in VLC checkbox in SVP Manager, changed the file permissions vor video_filters and enabled deinterlace?