I wasn’t aware of WHIP, thank you. Last time researched this there was only LL-HLS which was terrible and when I tried Steam for streaming, it was using RTMP with a 6 second latency.

However, while broadcast box looks nice, it seems to require significant setup to stream.

I don’t know what OS OP is using but on Linux, you can start a video call with Jami (or anything really), then use qpwgraph to send the game audio to the calling application. 2 steps, start call, send game audio to call.

But it’s up to OP what they want to do. It’s been a while, but Jami might support sharing system audio now. Their feature list includes “media sharing” in the call features.