hdmi out

Hi I was wondering if anyone came across the BTS of the DJI short film shot with the I2 I noticed that they have a hdmi cabled into the inspire for handheld shots. So there must be a port that can be used right? see attached images. I use the Inspire 2 a lot for live broadcast but sometimes...

I have a horizontal line scanning down my video image that is coming from the HDMI output and also visible on the device display, looks like a refresh line, not sure what is causing it. I need a clean output for live broadcast and the line is making it very unusable. I have a video of the...