从我的答案中复制粘贴，但添加了iframe/video mime类型：
Alter image output in content

function WPSE_80145_Mime($html, $id) {

//fetching attachment by post $id
$attachment = get_post($id); 
$mime_type = $attachment->post_mime_type;

//get an valid array of video types, add any extra ones you need   
$image_exts = array( \'video/mpeg\', \'video/mp4\', \'video/quicktime\' );

//checking the above mime-type
if (in_array($mime_type, $image_exts)) { 

    // the image link would be great
    $src = wp_get_attachment_url( $id );

    // enter you custom output here, 
    //you will want to change this to what you want in the iframe
    $html = \'<iframe><a href="\' . $src .  \'"></a></iframe>\';
    return $html; // return new iframe wrapped video via $html    
}
    return $html;
}

add_filter(\'media_send_to_editor\', \'WPSE_80145_Mime\', 20, 2);