To be honest, I'm guilty of it too. Calling whatever video game high score a "World Record."
It feels like this has led to some having faulty thinking about the term World Record. It seems to have led to an unhealthy attachment to meaningless scores.
So this is the rule of thumb they should have used.
Are there submissions from people in at least three different countries? Yes? Then it's a World Record.
Are there submissions from people in less than three countries? No? Then it's simply a high score.
But yeah, it's not really a World record without that.
Sort of like the World Series isn't really a World Series with only two countries.
Just my two cents.