YouTube Red?
(I know it's probably not literally 2 countries, but it's available in very few countries.)
(If anyone actually wants to know.)
Googling around a bit, it seems that Google's attempt to include everything under the sun into your YouTube Red subscription is to blame...
They could just give you ad-free youtube. But instead, they want YTR to include their YTR-only premium content, and also they want to throw in Google Music... all of that requires decyphering copyright laws and potentially registering as a royalties collector (IANAL). Typical Google behavior, an inflexible all-or-nothing approach.
I'm using the Red free trial (it's 3 months) and it's actually pretty nice to have more control over the experience and not have to deal with ads. I found the ublock origin wasn't perfectly effective on YouTube anyway.
If only FB offered a $10 a month no ad subscription it'd be a lot nicer to use too.