Hi!

If you want your remote guest to share his webcam and his screen with you, you can tell him to use Splitcam.

I think vMix to vMix (even with a 60 day trial version) is obviously a better solution but Splitcam is a decent solution

It allows to share and use a single webcam with multiple applications at the same time, but it also features video, image and desktop sharing. There's even a PiP mode which can be very handy to have a basic multiview layout!

Free. But displays ads for adult webcam services! (in the application UI, not the video content!)

It's compliant with all USB webcams, but also USB dongles like Magewell and last but not least with capture cards.

http://splitcamera.com/

Guillaume