It’s NOT going to be rebroadcast. It’ll be live or nothin’.
It’s likely that most international news orgs will take the feed off the BBC (who else?) with some of the other networks that are big enough (most of the American MSM, basically) throwing in a few of their own cameras for good measure.
If you’re NOT planning to stay up and watch (which I am, God help me), your best bet is to either A) DVR it for later viewing, or failing that B) have someone tape it for you.
I am guessing there will be a commerative DVD made with lots of video of lots of things including the pre service, service, parties etc.
for those that can afford these things, they are neat