i'm testing a multisite installation because i need to give a website to 50/60 groups of volunteers working for an NGO: they are key fundraisers, hosting dedicated events, presenting specific projects to local entities, agencies and businesses, or manning booths during larger events; so they need an official website to present their activities.
As we want to have a central moderation point a wordpress multisite installation seems to be a perfect solution. But we also would like to provide official media (images and may be also video) to them i'd like to know if it's possible to create a shared media library where I can store a set of official images they can use on their sites. In this way I also save space on my server..
How can i do it?