DLNA
This allows you to play media on any DLNA supporting device within your local network.
No Access Control
DLNA doesn't have any access controls, so keep in mind that anyone with a mobile device or laptop within your local network is potentially able to play any media on the server. Hence this may not be suitable for situations where you want parental control over what media can be accessed.
Adding Media
You can add media by selecting the settings button from the DLNA app.