On line 971 of the style.css file there appears to be a class that is affecting the height of the embedded object
http://www.willyurman.com/stories/wp-content/themes/gridspace/style.css
/* Video */
object, embed, video {
max-width: 100%;
height: auto;
}
In Chrome if I disable the "height:auto" property the entire slide is displayed for me.