How to unlist/disable (not delete) deleted youtube videos on playtube script automaticaly

Open file "index.php" in root directory of site
find this code:

$og_meta = '';
if ($pt->page == 'watch') {
$og_meta = PT_LoadPage('watch/og-meta', array(
'TITLE' => $pt->title,
'DESC' => mb_substr($pt->description, 0, 400, "UTF-8"),
'THUMB' => str_replace('mqdefault', 'maxresdefault', $get_video->thumbnail),
'URL' => PT_Link('watch/' . PT_Slug($get_video->title, $get_video->video_id))
));

and modify it to:

$og_meta = '';
if ($pt->page == 'watch') {
$og_meta = PT_LoadPage('watch/og-meta', array(
'TITLE' => $pt->title,
'DESC' => mb_substr($pt->description, 0, 400, "UTF-8"),
'THUMB' => str_replace('mqdefault', 'maxresdefault', $get_video->thumbnail),
'URL' => PT_Link('watch/' . PT_Slug($get_video->title, $get_video->video_id))
));

$YtbVidId = $get_video->youtube;
$SiteVidID = $get_video->id;
$GetVideoInfo = file_get_contents("https://www.youtube.com/get_video_info?video_id=$YtbVidId");
if (preg_match('/\berrorcode\b/',$GetVideoInfo)) {
        $con = @mysqli_connect('localhost', $sql_db_user, $sql_db_pass, $sql_db_name);
        if (!$con) {
            echo "Error: " . mysqli_connect_error();
            exit();
        }
        mysqli_set_charset($con,"utf8");
                mysqli_query($con,"UPDATE `videos` SET `privacy` = '2' WHERE `id` = '$SiteVidID'")
                or 
                die(mysqli_error($db));
        mysqli_close($con);
}

}

Next time when you or user/bot open page with broken video its will be set to unlisted on site