I have 3 video pins and when I first uploaded them, when they were on a board, they would start to play in the pin cover. Now two of my three videos are just a black screen and don't play. My one still does. I've ready here that if the first frame of the video is black it will show that, but the video that still works right plays past that first frame and plays like a video. How can I fix my other two video pins? Do I need to remove those and recreate them?