You installed the codec, but VLC still shows a green screen. Here is the final fix.
(≥ 3.0.x)
By following this guide, you should eliminate the black screen and stuttering forever. Enjoy your 4K H.265 videos in full glory. install hevc codec for vlc
He tried QuickTime. Green screen. He tried the default Movies & TV app. A polite error box appeared: "Missing codec. HEVC (H.265) required." You installed the codec, but VLC still shows a green screen
If you are seeing errors like "VLC does not support the audio or video format 'hev1'" , here is how to fix it: You installed the codec