Honey Optics cameras ship with a default resolution of 4k30fps.
Many existing and older monitors/tv don't yet support 4k video so they will not display the camera video feed.
You have to lower the cameras resolution to 1080p first to see the video.
Under System Select there's a small yellow dial with blue numbers that allows you to select a number/letter to adjust the a number/letter of a lower resolution. (Use a small flat head screw driver to adjust)
Chart is located on the bottom of the camera.