DO doesnt generate thumbnails for .mp4 files. How do I fix this?
Video thumbnails should be the same in Opus and File Explorer. If they aren't working in File Explorer either, you probably need to install a codec. Please see here for suggestions:
I managed to get it working with the help off this software: Media Preview
This information is helpful. After installing Media Preview, initially I still wasn't getting thumbnails for mp4 files, but then it started working, for some reason.
Which software is now creating and storing my mp4 thumbnails? Is it being done by Media Preview or Windows? (I'm using Windows 10, DO 13.21.)