The Center for Social Media showcases and analyzes media for public knowledge and action—media made by, for, and with publics to address the problems that they share.
Josh Freund reminds us one of the most interesting area for those who make documentaries: the archives. Working with archives takes time and specific skills such as for instance the ability to select scenes from footage (frequently shot at the time for reasons totally different from current needs) in order to reinsert them in a new context in a relevant and original way.
The non-linear navigation is a tool that allows you to explore materials that would otherwise be buried in a hard disk.
A tool which better than any other responds to the needs of deepening topics mainly for educational purposes, though not exclusively.
This topic would deserve further study.