Hello again.
My ambilight is set and tested according to manual on this site.
Led flashing correctly and almost everything is perfect.
After installing and testing I have a new problem.
During watching movie, searching for subtitles or pause system sometimes crash or freeze screen.
Before installation I had no problem with that.
Now I'm trying to find a solution but probably I'll install a new OSMC system.
The biggest problem during setting ambilight was connecting pins and Pi-Fi Digi to GPIO, but I create little loops on wires and squeeze them by the Pi-Fi.
Of course all wires was correctly isolated to avoid a short circuit to another pin.