Since Windows has its own idea how to show a MP4 thumbnail, it won't use what you added.
This is not a switch off issue but the app or OS may not support what you did.
I've been trying to add album covers to mp4 files that I have but none of them are showing. I tried using mp3tag, mediamonkey and itunes yet none of them worked.
I was wondering if I had something switched off which prevents my computer from enabling the art covers. Can someone please help?
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