Hacker News Reader

I share a tab/window and resize that window to be approx 16:10. Shows up nicely for others and I can still see the rest of my screen.

If I had another window open for chat/notes/emails I can still have that at half my ultrawide and just deal with a bit of overlap on my end

I did the same but not being able to share a terminal and a browser window at the same time is tough.

Ended up using OBS and sharing the obs preview window instead. This lets me add fun gifs and overlays as well to my screen for loading or success.