In the DJI GO app, when I complete a video using Editor and post it to Facebook, how do I add a thumb print or something else to replace the blank box that accompanies my video's?  Other than my description of the video, the square us alway blank and I have to include "double click" to open the video.  I've done a lot of research and still can't find how to it. Any suggestions??

In the DJI GO app, when I complete a video using Editor and post it to Facebook, how do I add a thumb print or something else to replace the blank box that accompanies my video's?  Other than my description of the video, the square us alway blank and I have to include "double click" to open the video.  I've done a lot of research and still can't find how to it. Any suggestions??