Issue with video standard module

I’m building this site and I want to add a video frame that autoplays and loops only to illustrate content. So I deactivated all options like show controls, progress bar, play in lightbox, etc. The video plays just fine while I’m editing, but if I preview it or publish it, I just see one still frame. Now, if I add one control or feature, like “play” button, then the video does autoplay in a loop, of course if I click or tap on the -now showing- play button.

I just want to have a video that plays by itself in a loop, no need to interact with it.