RTMP is a streaming protocol used for audio and video, especially Flash
RTMP (Real Time Messaging Protocol) is a streaming protocol over TCP. It was developed by Macromedia to stream content from a server to a Flash player.
Several variants of the protocol exist: RTMPS is RTMP over TLS, RTMPE is RTMP using a proprietary encryption mechanism, and RTMPT is an encapsulation of RTMP (or RTMPE or RTMPS) on HTTP.