"How German sounds compared to other languages" will make you laugh like a Dummkopf.
But as far as mustaches go, Italians' are by far the silliest.
In addition to showcasing some of our favorite stereotypes—Italians and French people are such cute and comfortable targets!—this really only demonstrates how German sounds if you say words with a ridiculously exaggerated throatiness. Which isn't to say this video (similar to that old joke about linguists discussing the word "butterfly") didn't make us laugh, because it did. If you want to feel superior, though, keep in mind that technically "Kugelschreiber is a ballpoint pen, and Naturwissenschaften is Natural Sciences." But why would you choose superiority over laughter?