I'm not convinced she agreed to him sharing these but i don't think she was really able to argue about it either. after all it was his work too and once it was uploaded that's it.. it's gone..
doubt that, unless it's just the footage from the camera's that fed the screens.. from my recollection and it was a long time ago there was no boom camera's or anything you would expect to see recording the crowd.
could be the case that the TV Broadcast, locally might be 4K just not the webplayer (GloboPlay). guess we just have to wait and see what comes from people in Brazil. (Fingers crosed)