I can only speak for the X800 and not the X700 or X800M2. Netflix can be had in 4K HDR10 and DD 5.1 with the X800 Netflix app. The Apple TV 4K Netflix app can handle DV\/HDR10 and Dolby Atmos. The X800 Youtube app can handle 4K HDR10 and 60fps. It outputs in PCM 2.0. The Apple TV 4K can now handle 4K, BUT, no HDR and no 4K @60fps. If you watch 4K 60fps material in the Youtube app, the Apple TV 4K will play it back at 1440 60fps. When the Apple TV 4K is set to allow Dolby Atmos, anything not in Atmos will be sent as PCM.\n\n Guys, please help me. is PCM bad? what is that exactly? Is there a better bit rate to select? I'm using a Yamaha RX-A1080 in a 7.2 environment.