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<방법.1><iframe width="640" height="360" src="https://www.youtube.com/embed/Qq4M2o-iC80?feature=player_embedded?wmode=transparent" frameborder="0" wmode="Opaque" allowfullscreen></iframe>
<방법.2> $(document).ready(function (){ $('iframe').each(function(){ var url = $(this).attr("src"); $(this).attr("src",url+"?wmode=transparent"); }); }); -