Look at the camera
Look at your script
Look at your co presenter
.... and repeat
Oh I absolutely detest that style. Why did it become so fashionable to have both presenters in shot all the time, sharing the sentences between them? I don't know what the intention is, but it makes for uncomfortable viewing as far as I'm concerned. I'd much rather one presenter be in shot at a time.
It can look very uncomfortable at times, especially on slow news days:
As for why they have both presenters in shot, I suppose often it's just done to give a wider variety of shots; you could probably also argue it brings a sense of familiarity and reassurance - I'm sure some marketing type somewhere would tell you it's better to have both Mummy and Daddy tell you about the horrible things going on in some far away country. If you think about it, it's almost like a family - you've got Mum and Dad as the reassuring newsreaders, the pretty daughter doing the weather, sometimes the hunky son presenting sport, and then the reporters are various other family members/friends/neighbours. Actually, I reckon there could be a sitcom idea there...
On that note, you might find this article
about TVNZ's news an interesting read. It bemoans the perceived dumbing down, including the whole two presenters in shot thing we're discussing; among other things, it suggests that the bulletins follow a comedic arc, with the two main presenters as a couple, the weather presenter as a sort of jester, and the reporters as 'lighter characters', designed to reinforce the relationship between the two leads.
paul_hadley, Rkolsen and itsrobert gave kudos