Discord cant stream desktop audio at all on Linux aside from sharing a tab's audio if you're using Discord in a web browser. There are custom clients (like discord-screenaudio which OP mentioned) capable of doing this to some extent but they're based on the web version of discord and lack features / can be buggy. Also these options don't have hardware encoding so any fast moving content will become a choppy mess for the viewers.

The other alternative on Linux is to just route the app's audio into your mic source. Others will hear it but it will come out as if its your mic so even those not watching the stream will have to hear the stream audio unless they mute you.

I'm not talking about youtube videos. I mean videos either on my pc or platforms in megathread like 123movies. I tried both with Jitsi. Video is shared but audio is not for some reason

Edit : By sharing I mean screen sharing. 123movies didn't work with the link option

this works pretty great, thanks

I suppose also opening the video file in the browser works for that?

It even has a group watch button. Never tried it though

Could I stream my personal home files? Or does it have to be something on the www?

Yeah... I used www in a question like it's 1993.

VLC was invented to screen share video from a host computer to a group call? TIL

How do I do it? Could you share some tips/guide?

yeah that's one of the reasons I'm looking for alternatives. It's almost always too difficult to set up for discord, or straight poor quality or unreliable.

In theory yes. But with obs you need a streaming server, and what server are you gonna use for pirated content?

What platform should I use with OBS to stream?

For streaming a game to a friend so we could connect via LAN I've used sunshine on the "server" and moonlight for the "client"

element has screen sharing/watch party options?