HAK 5 Screen Crab

The Screen Crab by Hak5 is a stealthy video man-in-the-middle implant.

This covert inline screen grabber sits between HDMI devices - like a computer and monitor, or console and television - to quietly capture screenshots. Perfect for sysadmins, pentesters and anyone wanting to record what's on a screen.

https://shop.hak5.org/products/screen-crab?srsltid=AfmBOoqUo0rp_Y9UOdN7LejMjPR1REjqyfDPAEW3LTqRHb5dMGNoHzdv