Hi, I'm building a tvOS client that uses the native Apple player (AVPlayer/AVFoundation) rather than a bundled software decoder. On Apple TV that's the only path that gets you hardware decoding, Match Dynamic Range and Match Frame Rate — but it also means I'm bound by what AVFoundation accepts, and that's where I've run into a wall. What I observe My device profile advertises HLS transcoding with an MP4 container: { "Type": "Video", "Protocol": "hls", "Container": "mp4",