gistfile1.html

//onHover sur les videos
$(function() {
    $(".video_home").hover(function(){
        $(".video_home > a > img").attr("src","") ;
    });
});



<div class="video_home" id="1" >
    <a href="http://vimeo.com/26317345" rel="prettyPhoto" title="Légende bloum">
    <img src="/app_dev.php/media/cache/video_thumbnail/uploads/images/4e817f269f7e2.jpg" width="100" height="75" alt="Légende bloum"/>
    </a>
    </div>
            <div class="video_home" id="2" >

    <a href="http://vimeo.com/26317345" rel="prettyPhoto" title="sdsqds">
    <img src="/app_dev.php/media/cache/video_thumbnail/uploads/images/4e818354bd776.png" width="100" height="75" alt="sdsqds"/>
    </a>
    </div>
            <div class="video_home" id="5" >
    <a href="http://vimeo.com/26317345" rel="prettyPhoto" title="">
    <img src="/app_dev.php/media/cache/video_thumbnail/bundles/lapaperiemain/images/caravanelapaperie_original.png" width="100" height="75" alt=""/>
    </a>
    </div>