.MOV problem with the browser

I often upload videos from my iphone to the cloud. I noticed that mac movies are working fine.
Nextcloud has a problem with this on windows (chrome, edge, etc.)
I only hear the sound of the movie. No picture
what can you do with it?

hey @kruger and welcome to the forums of NC.

Usually the browsers are the problem here as NC doesn’t transcode anything. So you’d need to install a .mov-compatible app to your browsers on windows

is there any advice? I will add .mov to google drive and one drive works fine