There aren't that many conflicts between Slovenia and Croatia; Croatia and Serbia get along far worse. The vast majority of Slovenian tourists go to Croatia, so most of them at least like us for our money. Some of us can be idiots, of course, but stupid tourists are found everywhere.
Since I've been tagged, I guess I should try to help. But I'm not sure what the issue could be; you're likely using a computer, not a phone, and you don't seem like the type that would mess with developer settings or install NoScript. So uh, try clearing the cache?
Or just install Firefox. It's the better browser in my opinion anyway. And the play buttons definitely work there.