The "video" in XF 2.2.13 is a hard-coded GIF (styles/default/xenforo/add_to_home.gif). If it's not displaying on your site, it might be due to a customization issue. Additionally, it should only display on iOS as the install process works differently on other platforms.
In XF 2.2.14, this will be changed to a proper video which can be customized via a style property. This change has been deployed here already.