To be fair, the article mentions Romansh and links to another article only about our fourth language[0]

I agree the sample is not difficult to understand as a nativ Swiss-German speaker. Only thing that comes to mind is that it's a Bernese (?) Swiss-German dialect which is not always easy to understand for 'proper' German speakers.

But in my opinion almost every single dialect in Switzerland has it's own specific words and almost every canton has it's own dialect so I wouldn't call them a language.

[0] http://www.bbc.com/travel/story/20180627-switzerlands-myster...