'How to add tags after a wp_insert_post() with get_meta_tags()

I am trying to create or assign tags to a post by extracting keywords from a website with get_meta_tags() but I can't do it successfully.

for example, youtube has these meta keywords: video, sharing, camera phone, video phone, free, upload

    $postarr = array(
                'ID' => $post_id,
                'post_author' => $post_author_id,
                'post_content' => $post_content,
                'post_title' => $post_title,
                'post_excerpt' => $post_excerpt,
                'post_status' => $post_status,
                'post_type' => $post_type
                
            );

 $insert_update_post_id = wp_insert_post( $postarr );
            
            $sitio =$form_data['_custom_field|link'];
            
            $tags = get_meta_tags('https://www.youtube.com/');

wp_set_post_terms( $insert_update_post_id, $post_assign_terms, $tags['keywords'] );

Thank you for your help.

phparrayswordpress


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