Set "DEFAULTS" or "Mandatory" settings for (new) plex players (browsers, app, desktop, Xbox, ...)

My kids are using Plex als “MY HOME USERS” and also my buddy as “Friends” user.
But they are NOT IT minded or to Young to know how to set all those settings in the player.
also my kids use allot of different players (browsers) at school, home, sleep over with friends, Firefox Mozilla, chrome, edge , …

It would be very good practices if I could set the player settings globally as default or mandatory !
like : language, theme music , auto login , time notation , quality settings …

maybe using templates for browser, android, windows

this would mean more user friendly for young users !

Early 2021 clean-up: duplicate