When I record video interviews over Hangouts / Skype / Zoom, I often ask the guest to record the audio locally using QuickTime Player, then get them to send me the audio file afterwards. I also record the video conference "in the cloud" using Google Hangouts record feature. This means I get better quality audio that I can resync afterwards.
Is there a good way to do the same thing with video as I do with audio on a Mac? When I try to record their webcam in Quicktime Player, it stops the video stream working.