Apple TV 2 if jailbroken can run Infuse for MKV playback but there are some issues these days. It’s a bit buggy and the hardware is a little underpowered.On a second note, I would love to have my ATV 3 play MKV files. I watch my movies through my Yamaha receiver which can play DTS audio. What software do you recommend? Is there any software that can transcode the DTS in the MKV? Right now I am converting from DTS to AC3.
Apple TV 4 and Apple TV 4K both play MKV with Infuse. No jailbreaking required. DTS is also supported.
Apple TV 3 is the worst of the bunch. It is useless for MKV because you can’t jailbreak it and you can’t run Infuse natively.