More commonly known as a tool for streamers, OBS Studio also has what's known as "Virtual Camera" built-in on Windows, Mac, and Linux. What this does is export whatever you have set up in OBS ...

Add Window Capture as a source, name it and choose the window you want to capture. You can choose to capture only the inner window, or the entire window (including the title bar).

OBS Studio can be used in many ways for recording and broadcasting once you get used to it. Some users are complaining that OBS Studio captures a small window instead of the full screen on their PC.