I might be remembering wrong, it might also need the HEVC windows 10 app. It is a paid app but mine came free with my laptop. I know the main thing is using the Movies and TV app. The DV app is called Dolby Vision Extensions app. https://thewincentral.com/microsofts-new-app-dolby-vision-ex... Indirect link because the windows store link looked horrible when I tired copy pasting. You might be able to get the HEVC app free if you Google, but I haven't tried it myself.