The DLNA media server shares video, music and picture files from a disk folder with TVs, phones and players on one interface. It covers limiting a server to one device, the servers that disk sharing creates, and how players find the server.
Universal Plug and Play (UPnP) in RouterOS: an Internet Gateway Device service that lets LAN applications request port mappings. The router creates dynamic destination NAT rules for the requested ports. Covers enabling the service, marking external and internal interfaces, and the security implications.