[Andy Tzeng]

You can try USB UVC grabber card.

It is driver free for MAC OSX and windows

And it can work on Final cut pro, mac skype, quickTime and etc without any drivers

The video demo is as below

https://febon.blogspot.com/2012/04/driver-free-grabber-card-can-work-on-ap.html

Grabber card user manual
https://febon.blogspot.com/2012/02/1.html