Keynote wasn't the only video folks had access to. Just isn't 'live'. State of the Union and most sessions are available once Apple preps them for viewing.
I doubt the keynote will be "normal". A significant amount of the keynote is structure around a dog and pony show where they are eliciting audience reaction ( in part with "stuffed" rows of Apple employees clapping for their own projects ). Unless they add their own canned laugh/clap/audience track that isn't going to work. ( Maybe they are going canned Hollywood sitcom, but I suspect that will not go over as well as they think. )
The keynotes are too fracking long. It isn't a Marvel Avengers movie. There is an excuse when it is all live but is the dog and pony show going to be live? ( taped demos would guarantee can remove any on stage glitch with some edits. ). Apple would do better if chopped it up into pieces and do away with time sink demos ( Other tech companies too. Stuff that goes past 1 hour - 1 hour 30 mins ... folks will be doozing off / on as some point past that. Attention spans don't last that long. )