I have two issues running NextCloud 18.0.3 (the latest stable version). First of all I would like to say that I’m running it on a virtual machine with Ubuntu 18.04, php 7.2, apache2. Secondly, I have the issue that when I play a video logged in the cloud, everything runs alright, but when I share a .mov file, it doesn’t play in Chrome, Edge or Internet Explorer (only on Firefox and Safari). Can this be fixed somehow from the server? Then, I have the issue with the file thumbnails - I downloaded an app called Preview Generator, generated all the previews with the known command /occ preview:generate all (or something like that), the previews are being generated, but then I see no thumbnails on files except the photos (I mostly need them for my video files). Is there a way to achieve this?