The Media module for Drupal 7 not only supports adding and managing media that is uploaded from a user’s computer into Drupal, but it also comes with a submodule, called Media Internet Sources, that allows using media assets from various Internet locations. Media Internet Sources provides the interface and the central piece of functionality that other contributed modules can leverage to allow usage of media files in specific places.

For example, the Media: YouTube module allows users to post YouTube videos on a Drupal site by using the video’s URL or embed code. While Media: YouTube makes sure that Drupal can talk to YouTube, in order to fetch the correct video, Media Internet Sources provides the interface to add the video in Drupal.