No, it happens to any kind of video file... I was thinking that somehow my video card doesn't allow the player to use its settings but i opened nvidia control panel and in video and image settings there was checked "Use video player settings".
I hope there is a solution!

In the image below you can see that i have set the luminosity,contrast and saturation to -100 without any effect...

When I play a mkv video file (720p/1080p), the basic video controls don't have effect... for example": i switch saturation/contrast to 25 and nothing happens to the image.
What should I do?