From VDR Wiki
The streamplayer plugin allows VDR to receive and display video streams over the network.
Streamplayer is a plugin to receive and display network video streams on VDR, turning VDR into a streaming client. The plugin is intentionally limited to DVB compatible MPEG1/2 streams that can be displayed without high CPU usage. One possible stream server is the VLC media player, another one is the HTTP server of the streamdev plugin. Streamplayer supports UDP streaming and HTTP streaming, based on the MPEG Transport Stream (TS) protocol.