Those are multicast feeds.
> Trying to push a live IP stream directly from the remote live venue rarely works as expected.
In my experience it almost always works as expected. We have highly specialized codecs and equipment for this. The stream is actively managed with feedback from the receiver so parameters can be adjusted for best performance on the fly. Redundant connections and multiple backhauls are all handled automatically.
> That's precisely why the broadcasters/networks do not do it that way
We use fixed point links and satellite where possible because we own the whole pipe. It's less coordination and effort to setup and you can hit venues and remotes where fixed infrastructure is difficult or impossible to install.
