Load wp-content/uploads from the remote site

remote-uploads.php

<?php

/**
 * Loads media from a remote site when on a local dev environment. 
 * Eliminates the need to download the uploads directory from the remote site for testing purposes.
 * Replace WEBSITE with you domain name.
 */
if ('WEBSITE.local' === $_SERVER['HTTP_HOST']) :
    add_filter('upload_dir', function ($uploads) {
        $uploads['baseurl'] = 'https:/WEBSITE.com/wp-content/uploads';

        return $uploads;
    });
endif;