In story map cascade template, I inserted (via media link in the narrative template) a youtube video. It appears with play button and plays fine on my computer, but on the ipad/iphone, it reverts to the "alternative photo image." I double checked my youtube settings and it confirmed is public/shared. I also tried to load a video into the cascade template via vimeo weblink, but nothing appeared, just a blank. I prefer to get the youtube video to play on the ipad. Its does not need to be auto-play or looped, just the standard hit the button on the screen and play. Any suggestions? PS> I have not "shared" my story map yet, but I can view the story on my ipad by logging into my arcgis account.