I was told that it's Associated Press TV who are providing and overseeing most of the infrastructure and technically stuff and as a result, they're providing an international feed. Who's using it I don't know. The BBC and Sky etc. will obviously have their own camera positions and directors.
Ah, that's not the same as what I've heard, but doesn't necessarily mean it's not correct!
There (obviously) won't be five sets of cameras inside the Abbey, and five scanners parked outside, because there's no room, and it would be way too intrusive. So there will be one core feed of the ceremony, available to all and sundry.
Other broadcasters will probably add their own coverage of what's going on outside, the line of route, etc - but again, there will be quite a few pooling arrangements.
I know that the BBC have sold the rights to both the BBC One programme, Huw and all. It appears this'll appear on many BBC Worldwide channels (Entertainment, America, Canada, Knowledge, etc), and is also being supplied to other broadcasters - in smaller parts of the Commonwealth. I think CBC in Barbados is one, for example. And this includes the later parts of the day too - eg the 2030 highlights programme (which, if I'm reading this correctly, appears to be on Sky Uno on Italy).
The BBC has also sold on a 'world feed', which will include the ceremonial bits from around London, but not any presenters or commentary.
Other broadcasters - ITN, Sky, and I'd imagine agencies like APTN will most likely be doing the same.