What's "OBS?" That would be valuable information.
It allows you to layer your inputs and different overlays together to create a single video output that includes things such as video games, webcam feed, etc. The video output is typically either recorded straight to video file for upload to youtube, or for streaming directly to a supported streaming service.
It's not purely used for video games, mind you.
In this case I believe the idea is that you would use OBS on your local workstation to setup your own web cam and a view of your desktop / work space for the purposes of peer development etc, and then pipe that out as a virtual webcam to other software that only support webcams as inputs.
That's my guess for what's going on here. Hope someone gets some good money from this.