I recently setup OBS as a virtual camera and used it as my source for a video call. It's a simple and easy process.
Download and install the latest version of OBS Virtualcam
Open OBS
Select Start Virtual Camera under Controls
Open your video conferencing software (Zoom, Skype, Google Meet...)
Go to settings then select "OBS Virtual Camera" as your camera, and your audio interface for audio.
This output will provide exactly what you see in the Preview in OBS, including any changes or scenes you might switch to. This is a great option for setting up meetings for interviews, podcasts, or professional presentations.