I can tell [some of] you guys live in pretty homogenous areas...
This is funny because I just posted in another thread about how linguistic mastery also involves being able to understand other accents.
Also funny because the OP link is from an ambiguously Eastern European youtube user and browsing through the rest of their music video links - I think any and all of them could have been put into the OP as a bad karaoke example and gotten the same kind of comments.
Have you guys ever seen a Maori 'haka' performance?
A troupe from New Zealand performed it once at my school and one of the middle school kids thought it was hysterically funny, not at all intimidating or serious.
As someone else said, it is all in the eye of the beholder, I guess.
“If you want to tell people the truth, make them laugh, otherwise they'll kill you.” ― Oscar Wilde
Imagine being forced to listen to this in the middle of the night by your neighbours, as Karaoke, when you have to get up early in the morning to work..
Any language sung to that screechy pitch will automatically kill your ear-drums. Some languages are naturally more mellifluous than others, of course, but what determines the quality of a sound is actually the individual's tone. Good speakers know exactly what timbre to voice the language in so that it will turn out nicely.
A few examples:
The Screechy Cases: One language. Same words. Same tune. But different outcomes.