Embedded content errors taking down pages

_config.php

ShortcodeParser::get('default')
    ->register('embed', [CustomEmbedShortcodeProvider::class, 'handle_shortcode']);

cache.yml

---
Name: app_cache
---
SilverStripe\Core\Injector\Injector:
  Psr\SimpleCache\CacheInterface.mycachenamespace:
    factory: SilverStripe\Core\Cache\CacheFactory
    constructor:
      namespace: 'mycachenamespace'
      defaultLifetime: 86400

CustomEmbedShortcodeProvider.php

<?php

use Psr\SimpleCache\CacheInterface;
use SilverStripe\Core\Injector\Injector;
use SilverStripe\View\Shortcodes\EmbedShortcodeProvider;

class CustomEmbedShortcodeProvider extends EmbedShortcodeProvider
{
    /**
     * Override handle_shortcode to catch errors from embedded content (e.g. rate limited by Youtube).
     * This will ensure only the video fails to show in the case of an error, rather than throwing a
     * server error and taking down the whole page. Also store the result in a cache to reduce the amount
     * of calls made to external services.
     * https://github.com/silverstripe/silverstripe-framework/issues/9073
     */
    public static function handle_shortcode($arguments, $content, $parser, $shortcode, $extra = array())
    {
        $cache = Injector::inst()->get(CacheInterface::class . '.mycachenamespace');
        $cacheKey = 'embed_shortcode_cache_' . preg_replace('/[^a-zA-Z0-9]/', '', implode('-_-', $arguments));

        if ($cache->has($cacheKey)) {
            return $cache->get($cacheKey);
        }

        try {
            $output = parent::handle_shortcode($arguments, $content, $parser, $shortcode, $extra = array());
            $cache->set($cacheKey, $output);

            return $output;
        } catch (Exception $exception) {
            // log error as preferred
        }

        return '';
    }
}