Video streaming service Plex on Thursday announced the availability of a beta version of its Plex Live TV. The live-TV streaming launch follows last year's introduction of the Plex DVR, which provides users with free over-the-air access to 86 of Nielsen's 100 most watched shows in the United States. The Plex DVR service allows users to manage their recorded programming via Android TV, iOS devices, Windows and Mac, as well a variety of set-top boxes, such as Roku, Chromecast, Amazon Fire and Apple TV, and the Xbox and PlayStation gaming systems.