There actually was a pretty neat use-case for live streaming via periscope last year. I'm a pretty big hockey fan (to the point where I follow beat writers of teams I don't consider myself a fan of). Last season there started to be a trend of writers using periscope to live-stream warmups and postgame interviews. It was neat to get that level of access, despite the video quality not being great. About a month after people started doing it, the league stepped in to say that live streams constituted "broadcast without consent" and most people stopped doing it.