It won’t surprise me at all but… no way you cannot get in in your country. Does your country have special rules about the apps in an app store?
And about watching Viki on a tv is better then on a phone or computer. My iMac has a 4,5K screen and my 13 year old tv is a “HD ready” one. At first I thought the difference wouldn’t be that huge but then I was watching something on youtube in 4K and OMG I could see more details, sharper colors etc. Not that Viki supports 4K or higher. Not that I noticed at least.
It’s not Croatia I’m talking about, but a country not more than a few hundred km away. Yes, it could be some general ban on apps. It could also be Viki.