Hi,
When my posts that contain a youtube video are made to Facebook they appear in Facebook with a blank image.
I always put a featured image in the featured image position. I have my settings per the directions on this site to achieve the big picture on Facebook.
I have tried including the same featured image in the body thinking maybe that would work. I have tried posting as “image post” without success.
I am not a developer or expert so please respond as such. Thanks for your time and effort.