The HTML5 didn't look right on my first attempt. Even when I followed the directions in this JamPot video tutorial explaining how to add HTML5, I still couldn't get it to work. First, there was the annoying problem that whenever the preview window loaded the Vimeo page, it automatically redirected the whole browser window to the Vimeo page I linked to. That meant I couldn't edit the link, title, or icon anymore. I tried it in two other browsers with the same result. When I tried a beta build of my app on my Android phone, the video still wouldn't play.