2020. 7. 20. · Plex has apps for Android, iOS, Apple TV, Amazon Fire TV, Google Chromecast, and Roku, among other platforms and systems. Desktop users access Plex through a browser, which is also the best way to. You can adjust video settings, such as format, frame rate matching, or test your HDMI connection for any problems. Open Settings on Apple TV.. Go to Video and Audio. Do any of the following: Set the video output format: Select Format, then choose the resolution, frame rate, and dynamic range settings for video playback. Turn on dynamic range matching: Apple TV can automatically.