Default Files in New Folder and Image/Video Preview

I have two questions related to NextCloud features and it’s configuration. I have searched through the admin documentation and this forum but could not find any solution. The questions are as follows:

  1. How can I have a default set of files and folder to be automatically inserted when a New Folder is created ? You can do this for a New User but not for New Folders that are created.

  2. When I share a folder with someone through email, can I configure NextCloud to open up an image or video in the same way a web page displays “Accept Cookies” the very first time the person opens that share link ?