How to stop a Vimeo video with jQuery

First, add an ID to your iFrame. Then add this to your javascript close window click function:

var $frame = $('iframe#yourIframeId');

// saves the current iframe source
var vidsrc = $frame.attr('src');

// sets the source to nothing, stopping the video
$frame.attr('src',''); 

// sets it back to the correct link so that it reloads immediately on the next window open
$frame.attr('src', vidsrc);