The source of this clip is not documented, but the phrase itself is Swiss German for asking what kind of person someone is, which explains why it works so well as a blunt reaction. It has spread mainly through short meme videos and soundboards, where creators use it to answer arrogant, strange or overconfident behaviour with a single sceptical question. Like bruh, it needs no setup or translation for viewers to understand the attitude behind it, and its short length makes it easy to reuse. That direct, local flavour is why it keeps appearing in Swiss German humour.