I want to change the media list with additionally query

As said in comments, it’s not a good idea editing WP core files. You can easily modify the query that displays your media posts by adding the following code to a plugin or your theme’s functions.php

add_filter( 'pre_get_posts', '_wp_media_pre_get_posts' );

function _wp_media_pre_get_posts( $wp_query ) {
    global $pagenow;

    if( ! in_array( $pagenow, array( 'upload.php', 'admin-ajax.php' ) ) )
        return;

    $wp_query->set( 'meta_query', array(
        array(
            'key' => 'meta_value',
            'value' => '%cloudinary%',
            'compare' => 'NOT LIKE'
        )
    ) );

}