에티테마 유튜브 썸네일 사용하지 않을경우

<div class="cards"> 
<a class='img-card' href="<?php echo $list[$i]['href'] ?>"> 
<?php 

//$arr = explode('/',$list[$i]['wr_10']); 
//$yt = str_replace("watch?v=", "", $arr[3]); 
//$yt = explode('&',$yt); 
//$yt = $yt[0]; 

//if($yt) { 

$img_content = '<img src="youtube.com/v/'.$yt.'/0.jpg" alt="'.$list[$i]['wr_subject'].'" style="width:100%; height: 200px;">'; 
echo $img_content; 

//}else{ 

if ($list[$i]['is_notice']) { // 공지사항 
//<!--span class="is_notice">공지</span--> 
// notice 
$thumb = get_list_thumbnail($board['bo_table'], $list[$i]['wr_id'], $board['bo_gallery_width'], $board['bo_gallery_height'], false, true); 

if($thumb['src']) { 
$img_content = '<img src="'.$thumb['ori'].'" alt="'.$thumb['alt'].'" >'; 
} else { 
$img_content = '<span class="no_image"><img src="'.G5_THEME_URL.'/img/noimg.png"></span>'; 
} 

echo $img_content; 

} else { 

$thumb = get_list_thumbnail($board['bo_table'], $list[$i]['wr_id'], $board['bo_gallery_width'], $board['bo_gallery_height'], false, true); 

if($thumb['src']) { 
$img_content = '<img src="'.$thumb['ori'].'" alt="'.$thumb['alt'].'" >'; 
} else { 
$img_content = '<span class="no_image"><img src="'.G5_THEME_URL.'/img/noimg.png"></span>'; 
} 
echo $img_content; 

}// notice 
//}// yt 
?> 
</a> 
<div class="card-content"> 
<h4 class="card-title">