Overview
100% tested and working solution.
Fix game engine cutscene
This is .exe from GOG edition: [link]
Fix video cutscene
Replaces video player on alternative. In this case, is MPlayer x64, but you can replace it with another one by editing file Cutscene.cfg
[link]
Copy “Video” folder to the game folder. Agree to replace the files.
For this Cutscene.exe need .net Core 3.1 Desktop Runtime x64[dotnet.microsoft.com]