Default [Q] Video not avaliable in YouTube App but avaliable in browser.

Hi everybody!
I have a problem...
I have phone connected to my home WiFi.
I can play movie on YouTube on every computer, i can play movie on YouTube in Internet Browser, but i can't play it in YouTube App.
It says that "Video is not avaliable in your country".

A lot of videos i cant watch in YouTube App because of this. Whats wrong?

Why YouTube App see me in another country then Internet Browser?

Whats wrong? It is very annoying :/