Header Media Video not fit

Hi, I would like to fix my header media video from youtube link. When embedding, my video is not fitted to the screen. The 1/8 portion on the bottom of the video is being hidden by the navigation bar below. I would like to fit it to the screen where the video can be seen in full. and if possible, stretch to its width from border to border. my site was http://aerobeta.mywebcommunity.org/ thanks!