I'm extending my laptop display with an HDMI cable. I use Mission Planner on my laptop, and slide my gstreamer video over to a TV. This HDMI Cloner Box goes in between my laptop and TV (HDMI pass through, no lag). I have a usb external HDD going to the HDMI Cloner Box, and it saves my video to the HDD. Works perfectly!!! This was $100 on Amazon.com.