When you add paralax video and revolutin slider, you can encounter with a weird paralax height in lower resolutions. You can fix it by this step.
Find line 2428 in

../goodstore/js/app/app.js

and add there this code.

		jQuery('.rev_slider').bind('revolution.slide.onloaded', function() {

			$.each($video, function(el) {
	
				position($(this), options.mobile);
	
			});

		});