Protect media uploaded with content editor

media-vault-wp-editor.php

<?php

/**
 * Plugin Name:  BE API - Media Vault protect media from editor
 * Description:  Allow to protect media uploaded with content editor
 * Plugin URI:   http://www.beapi.fr
 * Version:      1.0.0
 * Author:       BeAPI
 * Author URI:   http://www.beapi.fr
 */

add_action( 'added_post_meta', 'bea_added_post_meta', 10, 4 );

function bea_added_post_meta( $meta_id, $object_id, $meta_key, $meta_value ) {
	if ( ! function_exists( 'mgjp_mv_move_attachment_to_protected' ) ) {
		return false;
	}

	remove_action( 'added_post_meta', 'bea_added_post_meta', 15 );

	if ( '_wp_attachment_metadata' !== $meta_key ) {
		return false;
	}

	if ( 'attachment' !== get_post_type( $object_id ) ) {
		return false;
	}

	mgjp_mv_move_attachment_to_protected( $object_id );
	update_post_meta( $object_id, '_mgjp_mv_permission', 'logged-in' );
	add_action( 'added_post_meta', 'bea_added_post_meta', 15, 4 );
}

I had to add this action as well to get it to work for me:

add_action( 'updated_post_meta', 'bea_added_post_meta', 10, 4 );

Having an odd situation where certain file types aren't protected (.csv, .docs, etc) but others are OK (.jpg, pdf). Commenting out this line:

if ( '_wp_attachment_metadata' !== $meta_key ) { return false; }

works but I'm not sure whether there are any implications for this. Any thoughts?