I need help in figuring out why the drop-down menus in the top navigation menu, are appearing behind the video player depending on what browser I use.

The page in question is: www.triumphantchurch.org/index1.html

The drop-down menus are under "About", "Ministries", and "Services."

Safari displays the drop-down menu on top of the video. This is what I want.

However, Flocks, IE, and Firefox display the menus behind the video. This is what I do not want.

I'm not a real Web designer. Meaning, I never attended classes. Just know enough to be dangerous. LOL! But I'm what the Lord provided!

Thanks for your help!