[ElProximo]

Well I can say this much:
Back in the olde days the whole hook (and integral part of the story and experiment) was that you could use this whole 'online internets' thing to actually watch them live 24/7.

Anyways, it was often a story in itself. The editing or TV broadcast version compared to what you had really seen going on.
You might follow a HM all day and realize they were reasonably polite, helpful, mostly 'positive'. A seemingly minor disagreement might pop,
but,
in the big picture was quickly cooled, they solved it fast, moved on, were back to hours of good nature fun.

But that is NOT what you perceived on the edited highlights on TV! You could be given the impression this HM's ONLY moment was to kick off on the hapless victim!
Only the bad moment being truncated, zoom on the face,
and,
In the editing they can select out 'reaction faces' that are not quite in real time and of course the dramatic music, etc.

So yes, I think you are right. It is edited and reworked and redrawn in a sense.

But be thankful - the UK version actually stays pretty close to the truth. BBUSA was absolutely terrible for creating what were nearly entirely contrived HEAVILY edited and re-edited and there is reason to believe 'takes' and what are nearly 'scripted lines' etc.

And something about Diary room. I have been told (by people who would know) it can actually be more 'deceptive' than anything when BB would really be 'coaching them' into saying things or doing things.
BB: So .. you have to admit John is a real sneak?
HM: Uh.. well.. some would say he is a sneak I guess.. i didnt say that
BB: But in the house John is probably the 'sneak' if anyone is?
HM: Well.. i guess he might be the 'sneakiest' character to some watching
BB: So who is the sneakiest
HM: Well I guess, if you put it this way [edit starts] John is the sneakiest person in this house [edit ends] if you are saying what is the 'story' some might get from this.

I'm just paraphrasing an example but you get the idea. You will just know that Carol went to the DR to complain how 'John is the sneakiest one in the house'.

Add to that a selected clip of John (NOT taken at that same moment in time) that makes it appear John is outside the DR with a 'sneaky look'.
Even though that 2 second clip was earlier, was in no context to 'sneaking' and was when he was looking for some pepper in the kitchen. Not 'scheming'.