Probably bookmarked this before but anyway: https://kaffeeringe.de/2020/04/13/obs-studio-mit-touch-portal-steuern/ – control #OBSstudio with remote app. Featured important link to https://github.com/Palakis/obs-websocket.
I have seen some articles in the past which explain how to build the ecosystem around your video streaming, such as live chat and forums, but which leave the actual video streaming to Twitch.tv. I made a note the last time I saw one of these articles to write one of my own explaining the video bit. As is often the case with video, we’ll be using the excellent ffmpeg tool for this. If it’s A/V-related, ffmpeg can probably do it.