How to organize video broadcast from rpi to a re-streaming server?

Question

linux

It is necessary with a raspberry share, it has a node.js server, if it matters, send the video to the server that runs in iis on the .net core. This server should act as a re-streamer, that is, the vidos from the distribution share in one stream goes to the server, to which several people can already connect.
Sound is not needed.
Well, all this with minimal delays in hat quality is of interest.
What I could google is ffmpeg, but there the point is that incomprehensible krakozyabry are issued and some kind of magic immediately, everything works. Does not work. The point is that when you do it through these commands, then the split share starts broadcasting from itself, that is, you need to connect to it to watch it, but I need to send it to the server, I couldn’t find and figure it out
Please tell me