Edit in JSFiddle


              
<div id="player-hover-funktion" style="display:none;">
</div>

<img src="http://lorempixel.com/853/480/technics/6/" id="Bild-ID2" />
<script type="text/javascript">
$('#Bild-ID2').mouseover(function() {
$('#player-hover-funktion').show();
$('#player-hover-funktion').append('<iframe width="853" height="480" src="http://www.youtube.com/embed/CkyIpJOuHvA?autoplay=1&controls=0" frameborder="0" allowfullscreen></iframe>');
$('#Bild-ID2').hide();
});
</script>