Video thumbnail triangle overlay?

Hello! I’ve managed to turn on previews for my video files.

BUT. Now I have a problem. I can not distinguish my photos and videos. They are both just rectangles. In every viewing software I saw video has a “play” triangle overlay which is an easy to see sign.
Can something like that be done in nextcloud?
If not, can some kind of a hook be added to preview generation process (I think I’ll be able to add an overlay through imagick)?


I would be interested if you find a solution.
At least in the Android app there is an overlay.

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