I tried that with my E6, and it does not recognize the file and will not play it. So then I attached the USB to my OPPO 203 and it also could not play the file. Finally I tried in on my Panasonic UB9000, and it played it back as HDR HLG, not DV or HDR, and only played it a 1 frame per second. So even the top UHD players can not play the DV file created by the iPhone. No wonder the ATV 4K can not either. I would imagine most AVR's will not pass it through either. Leave it to Apple to use a DV profile that is incompatible with most devices.