Fix Youtube Iframe ( Error 153 ) for Wordpress Content

Fix Youtube Iframe Error 153 for Wordpress Content

function fix_youtube_153_and_lazy_load($content) {
    if (is_admin() || empty($content)) {
        return $content;
    }

    // This handles both images and iframes
    $content = preg_replace_callback(
        '/<(img|iframe)([^>]+)>/i',
        function ($matches) {
            $tag = $matches[1];
            $attributes = $matches[2];

            // 1. Add lazy loading if not already there
            if (strpos($attributes, 'loading=') === false) {
                $attributes .= ' loading="lazy"';
            }

            // 2. Add Referrer Policy (Fixes Error 153 for YouTube)
            if ($tag === 'iframe' && strpos($attributes, 'referrerpolicy=') === false) {
                $attributes .= ' referrerpolicy="strict-origin-when-cross-origin"';
            }

            return '<' . $tag . $attributes . '>';
        },
        $content
    );

    return $content;
}
add_filter('the_content', 'fix_youtube_153_and_lazy_load', 99);