Streaming .mov data

Hallo Community,

i have two problems with my well running nextcloudpi-solution:

  1. Videos in the data format .mov are not streaming from my nextcloud to my smartphone via app when uploaded via the desktop app. it runs perfectly smooth when uploades via the autoupload from the smartphone-app. furthermore every video, no matter if uploaded from pc or mobile, is not streaming via in the browser.

  2. pictures uploaded from the smartphone-app gain the their previewpicture pretty fast. when uploaded via PC not.

NextCloudPi version v1.15.3
NextCloud iOS:
NextCloud PC: 2.5.3

OS Win 10 17763.678
Browser Edge Version