var fakeBg = $('#fake_bg').height($(document).height());
$(window).on('scroll', function(){
fakeBg.css('margin-top', -$(this).scrollTop());
});
<?
$token = "Ваш access_token"; // access_token брал от сюда http://u.to/8nA8CA
$video_id = "100973593_171060396";
$videoGet = file_get_contents("https://api.vk.com/method/video.get?videos=".$video_id."&access_token=".$token);
$json_video = json_decode($videoGet,1);
Echo'<iframe src="'.$json_video["response"][1]["player"].'" width="853" height="480" frameborder="0"></iframe>';
?>