Either way, I can't imagine the indignation of the American public if NBC didn't broadcast the OOC live. Especially in today's era where we can have access to everything, live, anywhere around the world. Obviously for London it had aroused a lot of indignation (I may be wrong, not being American, but that's what I thought I understood), I do not dare to imagine with the concept of this OOC which, on paper, is the most existing ceremony since ... always ? So I think that for their image, NBC perhaps had no choice. (afterwards this is no longer a new thing on their part to braodcast live the OOC, I think that in any case even if it took place in a stadium NBC would have broadcast it live).
Concerning the location of the Today team, I can't imagine them being installed on a bridge where there is already public planned. Firstly because it would take up a lot of space (especially for the technical installations), also because I don't think that NBC will be the only broadcaster to have authorization to set up on a bridge during the ceremony; it would be incomprehensible (and almost scandalous) if France Télévisions, at the very least, could not have this right. So maybe we will have a bridge entirely dedicated to television channels?
Fortunately, Paris made the choice to set the time of the opening ceremony based solely on artistic criteria (and it is still a very nice idea to have a ceremony both during the day, with the sunset and night, especially when it takes place in the heart of Paris), and not because of the demands of a television channel that is not French, regardless of the billions they give to the IOC.