유튜브최신글에서 영상재생이안되는데..........왜그런걸까요??

<?php

if (!defined('_GNUBOARD_')) exit; // 개별 페이지 접근 불가

 ?> 

<!-- 최신글 시작 -->

<div class="col-md-12">

    <?php for ($i = 0; $i < count($list); $i++) {

    $link1_id = $list[$i]['wr_link1'];

    ?>

    <div class="col-md-4" style="margin:0 0 30px 0 ">

        <div class="youtube" style="position:relative">

            <iframe style=" background:#000; color:#fff" src="https://www.youtube.com/embed/<?php echo $link1_id; ?>?rel=0&amp;controls=0&amp;showinfo=0&autoplay=0" frameborder="0" border=0 scrolling=no allowfullscreen>

            </iframe>

            <div style="position:absolute; top:84%; left:0px; width:100%; height:20px; padding:0; margin:0; background:url(<?php echo $latest_skin_url ?>/back.png); font-color:#fff; color:#fff" ><a href="<?php echo $list[$i]['href'] ?>" style="color:#fff; font-size:15px; "><span style="padding:5px 0 0 5px;"><?php echo cut_str($list[$i]['subject'], 30, "..") ?>

                </span></a>

            </div>

        </div>

    </div>

    <?php }  ?>

    <?php if (count($list) == 0) { //동영상이 없을 때  ?>

    <li>동영상이 없습니다.</li>

    <?php }  ?>

</div>

<style>

.col-md-12,.col-md-4{

    position:relative;

    min-height:1px;

    padding-right:15px;

    padding-left:15px

}

.youtube { position: relative; width: 100%; padding-bottom: 56.25%; }

.youtube iframe { position: absolute; width: 100%; height: 100%; }

@media (min-width:992px) {

.col-md-4 {

        float:left

    }

    .col-md-12 {

        width:100%

    }

    .col-md-4 {

        width:33.33333333%

    }

    }

</style>