mr-legend_wiki/lib/plugins/oembed/conf/default.php

<?php
/**
 * Default settings for the oembed plugin
 *
 * @author Dwayne Bent <dbb.pub0@liqd.org>
 * @author nik gaffney <nik@fo.am>
 */

$conf['resolution_priority'] = 'link discovery';

$conf['enable_direct_link'] = 1;
$conf['enable_link_discovery'] = 1;
$conf['enable_provider_list']  = 1;

$conf['format_preference'] = 'json';

$conf['fullwidth_images'] = 1;