When I plug in my hero 3 black into the hdmi port on the gimbal I get perfect video feed but I cannot control the functions of the gopro so I went and bought a new hero 4 black and I can use the controls but now I don’t get a video feed, I did get it a couple times but now I cannot get it back up but the hero 3 black works perfect. Also I am using the same 1080 60 m setting as I was when I did have the video feed and I did reinstall the app both on my phone and I pad. Is there a certain sequence you need to follow in order for the hero 4 black to get video feed when powering everything on ? This is frustrating. Thanks for all the input in advance.