How to properly set up a video server for a webcam stream?

Question

System administration

The principle of operation is similar to webcam. There is a stream from several cameras to several people, the load is large, about 400 people connected at the same time per day. Opinions are very different, someone says not to use any software and configure through node.js, someone says that software is still needed. I really want to do it qualitatively and reliably, tell me how to do it most competently.