Iframe Ordner und Datein auf anderen Seiten einbetten lassen

Problem

Many people want on their webpage not only a link for a download,

1. but directly a visua preview of the file (Example: https://bildung.vonmorgen.org/oasis-games/#Spiel_statt_Sozialarbeit)
2. or even a preview of a folder with a bunch of files to donwload. (Example: https://bildung.vonmorgen.org/open-space-methode/#Materialien_zum_Download)

Until know, they have to use other tools like box.com, because with nextcloud it is blocked, as you can see on this testpage:

Solution

Iframes zulassen Anleitung hier: https://goneuland.de/nextcloud-per-iframe-einbinden/