Video Blank Space

Hi, I am using the Cool Timeline plugin to display videos. Other default theme works just fine, but this theme [Gridzone] ended up with a lot blank space, I checked the CSS and could not find the solution, I am wondering if there is any way to appear normally? Thank you!

By the way, thank you so much for creating this theme, find tons of themes but only this one I love the best!

The page I need help with: [log in to see the link]