Click the "Insert video" tab and add your link. Before posting, this \/\/ is how it should appear, minus the spaces, inside the brackets.
[VIDEO ]http://www.youtube.com/watch?v=PiZHNw1MtzI[/ VIDEO]
There is a weird issue when trying to get a vid to embed to display both on mobile and desktop. It's like I can get it to do one or the other but not both.