Esxi running macos For selur

[Selur]

Probably Rec2020 transformation in old color matrix didn't work for same reason.

Usage of Rec. 2020 isn't as old as ColorMatrix.
ColorMatrix in FFmpeg still doesn't support Rec.2020.

Yep, i can see changes in VS script code but i can't see changes in VS viewer and in rendered video.

Depending on the From&To it's really hard to spot difference unless you have specific scenes.
Also you need a properly calibrated monitor.
Scenes with light halos are usually a good start also I configure Hybrid to show Original&Filtered interleaved.
I see changes in Vapoursynth Filter Preview for all combinations on Windows.

Cu Selur

Ps.: uploaded a new version