... I can't hear the differences in part 1= "guys" and part 2= "down the hill", and I can't hear, whether BG's voice sounds "exasperated".
Doesn't mean, you aren't right!
Your understanding of context and connotation in English is MUCH better than mine is in German. :-> (I'm guessing that perhaps "FromGermany1" indicates that you are a non-native speaker of English?) As Judge and Ozoner noted, to a native speaker of standard US English, "guys" is inflected upward at the end, as if hinting slightly at it being a question from someone in authority. As in: "Guys? You need to pay attention." It calls for the attention of the girls, but it is (IMO) a question by its inflection, and a bit of a command by its tone. One often hears this upward-inflection that makes a statement sound like a question in pre-adult girls, though in their case, the question-sound indicates deference to authority, unlike BG's question-sound.
Then the "DTH" speech is in an authoritative voice, to my ear. I don't hear "exasperated" in the "DTH" tone as much as I hear a voice establishing control over others, with an imperative quality. This difference in interpretation is obviously VERY subjective. Most of us agree on how to interpret tone of voice most of the time in most situations--but there's a lot of variability in it.
So to me and in my own opinion only, the tone of "Guys" means 'Listen, and I'm not joking around, OK?' And then in "DTH" the speaker sounds to me that he expects to be obeyed, but isn't being harsh about it--to me it sounds very much in control, not really "exasperated." That's my own reading of it; your mileage may vary.
I'm not trying to overelaborate this; it just did not consciously occur to me that the two parts of the BG audio are so different in tone. It sounds obvious once it is pointed out, but I didn't hear it before. It might well not be noticed by someone who isn't a native speaker of English.
VERY interesting observations; this theme is stretching my brain--and very usefully, too.