The subtitles are lying. This is the real translation of what he is saying: "Because foreigners are watching this, I can practically say whatever, move my hands from time to time, to the left, to the right, like I was thinking about what to say next, a bit of a pause, so that I stumble, because I'm still thinking..."

BTC City is a part of Ljubljana that is composed of several big shopping centers/malls. It developed out of Centralna skladišča (Public warehouses, 1954), renamed to Blagovno Transportni Center (BTC, 1975, Goods and transport center) and later to Blagovno Trgovinski Center (Goods and Shopping center). In the 1990s (when Slovenia declared independence from Yugoslavia) it commercialised and became one of the largest concentrated shopping mall areas in Europe. The history of the name places it decades before Bitcoin was created, it has nothing to do with it. There probably are some shops that accept Bitcoin but I always use Euro there, as is usual in the Eurozone countries. See: https://en.wikipedia.org/wiki/BTC_City

Slovenia really is a very Bitcoin enthusiastic country, though, but there are no Bitcoin cities here, at least for now.