post-meta-file.php

<?php
/*
Plugin Name: Post Meta File
Plugin URI:
Description:
Author:
Version:
Author URI:
*/


// Shortcode_display :  post_meta_file    // like: show_post_list

function post_meta_file_cb( $atts = [], $content = null, $tag = '' ) {


	$loop = get_transient( 'post_meta_files_loop' );

	if (  ! $loop  ) {

		$args = array(
			'post_type'      => 'post',
			'posts_per_page' => - 1,
			'meta_query'     => array(
				array(
					'key'     => 'test_video',
					'value'   => '',
					'compare' => '!=',
				),
			)
		);

		$loop = new WP_Query( $args );
		set_transient( 'post_meta_files_loop', $loop, 6 * HOUR_IN_SECONDS );
	}


	ob_start();
	if ( $loop->have_posts() ) :
		echo '<ul>';
		while ( $loop->have_posts() ) : $loop->the_post();
			$files = get_field( 'test_video' );
			?>
            <li><a href="<?php echo $files['url']; ?>"><?php echo $files['title']; ?></a></li>
		<?php
		endwhile;
		echo '</ul>';
	else :
		_e( 'Sorry, no posts matched your criteria.', '' );
	endif;

	?>
    <div class="">


    </div>
	<?php
	// return output
	return ob_get_clean();
}

add_shortcode( 'post_meta_file', 'post_meta_file_cb' );

//add_action( 'save_post', function($post_id, $post, $update){
//
//	// Check to see if we are autosaving
//	if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)
//		return;
//
//	delete_transient( 'post_meta_files_loop');
//
//}, 10,3 );