A few weeks ago, Plex added official support for 4K video files on the 2nd generation Amazon Fire TV with their v18.104.22.1688 update. This means 4K videos can be directly played on the Fire TV without your Plex server needing to transcode the files. This includes support for H265 HEVC encoded files, however many users are finding their 4K files don’t meet the required specifications for direct playback by Plex. For starters, files must be encoded with a maximum bit depth of 8-bits per sample and contain metadata identifying them as having a Main profile level. Missing surround sound support is also an issue, so files should have an AC3 or AAC audio track present. Even if the file fits all the criteria, it still may not play directly due to a bug identified last week. Plex is working to improve 4K playback on the Fire TV, so look for better support with future updates. While the newly added 4K support is not perfect, it’s a good first step towards local 4K content playback for the Fire TV 2.