H5P
Create widgets for any purpose in minutes and embed them in any web page.
- interactive videos
- branching scenarios
- dialog cards
- advent calendar
- interactive book ...
https://h5p.org/content-types-and-applications
https://h5p.org/installation via Wordpress / Drupal or Moodle plugin (php) - no standalone version?
no nextcloud app yet available for h5p