No matter how hard I try I can't run Doom 3 on Steam and stream it. It is the same for other stuff too. I try to use ALT + Tab to switch ..

[Worldzworstgamer4life]

to different things while trying to stream with OBS on YouTube and it is not allowing me to add the game to what I want to show. Over many versions OBS has gotten harder and harder to use. I get that they want to improve things by adding features but the simplicity is gone. Btw I am running this on Windows 10 64 bit and have the latest OBS version. Also by trial and error I found out that even tabbing to other stuff with that game open is not working. Anyone have an answer for this?