https://obsproject.com/forum/resources/how-to-set-up-your-own-private-rtmfp-server-using-monaserver.153/ (copied here as a backup)
This article is inspired of the great guide of How to set up your own private RTMP server using nginx. https://obsproject.com/forum/resources/how-to-set-up-your-own-private-rtmp-server-using-nginx.50/
MonaServer is a tiny and scalable open source server which provide protocols RTMFP, RTMP, RTMPE, WebSocket and HTTP. Server applications are written in lua and clients just need to support one of these protocols.
The interest of MonaServer here is the RTFMP broadcast feature that avoid congestion (because it is a UDP protocol) unlike RTMP.
This guide will presents you an easy way to broadcast a video with OBS over RTMFP. Don't worry, you will not need to configure or write any code here :)