Over the summer, Plex Live TV arrived in beta form for all Plex Pass subscribers. Unlike services like YouTube TV or Sling TV, this isn’t a streaming service from a content provider. Instead, Plex Pass subscribers have to hook up an over-the-air (OTA) antenna to a compatible digital tuner, after which you can access OTA content from within

Source: Hot Hardware – Plex Live TV Expands To Roku Streaming Platform With Partial DVR Support