 DirecTV also offers the AM21 (an ATSC add-on for the HR21), the HR21-Pro (an HD-DVR with 100 hours HD or 400 hours SD recording capacity), and an online DVR scheduler.AT&T's planned over-the-top service for DirecTV will not require a satellite dish or a receiver to receive DirecTV programming, but simply a high-speed internet connection.DirecTV Now will be available through digital media player devices such as Roku, Amazon Fire TV, Chromecast, and Apple TV.