They're used to be in front of the camera, so it became natural for them. Seeing someone not comfortable, wouldn't freak them out, again because they're at ease.

It was actually not really good and I hope this guy will either get used to these "public" speakings or find a way to "get control" of the situation.

Yeah from the viewer's perspective it wasn't the kind of clip I was expecting!! The clip is absolutely fine (I mean that it wasn't tens of seconds of dead air or something someone would notice who is barely paying attention) - if I hadn't been paying THAT much attention after glancing through the write-up I wouldn't even describe it as awkward. they handled it really well, first probing him with leading questions and then when he explicitly broke character and said "I'm losing it", saying it's no problem and moving on. Unless someone is paying extreme amounts of attention they never would notice anything odd about that clip, just something they got through, the slightest of hiccups. Yes, anyone paying attention will notice what happened, but it's not a disaster from a programming perspective at all. it wouldn't get shared on youtube with the title "awkward interview!!" the way newscaster blooper reels get shared. (You can search for that.)

But after glancing through the write-up this does give you an amazing insight into just how much CONTROL over a narrative and an interview like this the newscasters have. it will certainly give me more insight the next time I observe what seems to be the slightest of hiccups.

Yeah these two newcasters are the regulars for ABC News 24 in Australia and they are very good at presenting, sometimes even getting too distracted in conversation on live tv!