WordPress上傳的視頻不能播放Html 5標籤？

<?php 

$args = array(
    'post_type' => 'attachment', 
    'numberposts' => -1, 
    'post_status' => null, 
    'post_parent' => null, // any parent 
    'post_mime_type' => 'video/mp4' 
); 

$attachments = get_posts($args); 

if ($attachments) { 
    foreach ($attachments as $post) { 
    setup_postdata($post); 
    the_title(); 
    // the_attachment_link($post->ID, false); 
?> 
    <video width="320" height="240" controls> 
    <source src="<?php  wp_get_attachment_link($post->ID, false); ?>" type="video/mp4"> 
</video> 
<?php 


    the_excerpt(); 
    } 
} 

?>

我已經在wordpress媒體上上傳了mp4視頻，但是我不能在html5標籤中播放我不知道我要去哪裏錯誤的任何幫助將不勝感激。WordPress上傳的視頻不能播放Html 5標籤？

來源

2016-08-28 kumar soni