Rtmp, hls, ffmpeg dig in the right direction?

Question

Video broadcast

Recently I came across an article on Habré on the server of online broadcasts on the node. After picking and playing enough, I wanted to delve into the essence of the issue.
Am I digging correctly.
1. Rmtp server, to which we will be able to connect via obs in the future
2. So far I have only found the flv format, but I think if necessary it will be possible to encode (is it even necessary?) a stream in mp4, we take it as the base one.
3. We push it into ffmpeg and cut it as it should, forming an m3u playlist
4. Actually, at the front, we feed the yurls with our stream to the player.
I will be grateful in advance if you tell me what I missed, what else you can read on the topic to understand and whether I am moving in the right direction. Thanks :)