Nginx - Prevent other domains from accessing video files

##
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# https://www.nginx.com/resources/wiki/start/
# https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
# https://wiki.debian.org/Nginx/DirectoryStructure
#
# In most cases, administrators will remove this file from sites-enabled/ and
# leave it as reference inside of sites-available where it will continue to be
# updated by the nginx packaging team.
#
# This file will automatically load configuration files provided by other
# applications, such as Drupal or Wordpress. These applications will be made
# available underneath a path with that package name, such as /drupal8.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

# Default server configuration
#
server {
    listen 80 default_server;
    listen [::]:80 default_server;

    # etc .......
    # etc .......
    # etc .......
    # etc .......

    # Prevent other domains from accessing your video files

    location ~* \.(mp4|m3u8|key|webp|mov)$ {

        # Define your domain name

        valid_referers none blocked server_names https://your-domain.com*;

        if ( $invalid_referer = "" ) {
            return 403;
        }
    }

}