Overrides Media on Individual Sites

I love this plugin! It works for me in creating a global media library. All media added in any site is available across all sites.

However, the plugin overrides the individual site media so that any existing media on individual sites are not visible at all: only media files newly added when the plugin is active are available.

My thought is that any media added in the global library site would appear as global media in every individual site along side of the existing private media of each independent site. And when an independent site adds media, it would remain private to that site.

It would be great if the individual site admins could select which of their media is visible globally or not. And if the super-admin could toggle on/off the individual site admin's functionality to do that.

Thank you.

The issue names no files, tests, or entry points. Start by tracing how the plugin exposes network media and hides site media, then clarify the interaction between global media, private media, per-item visibility, and the super-admin toggle before defining acceptance tests.

Written by the indexing model from the issue text.