[BUGFIX] Fix PHP 8 error

Classes/Controller/YoutubeController.php

 <?php
 
-namespace SGalinski\SgYoutube\Controller;
-
 /***************************************************************
  *  Copyright notice
  *  (c) sgalinski Internet Services (https://www.sgalinski.de)
@@ -20,6 +18,8 @@ namespace SGalinski\SgYoutube\Controller;
  *  This copyright notice MUST APPEAR in all copies of the script!
  ***************************************************************/
 
+namespace SGalinski\SgYoutube\Controller;
+
 use Exception;
 use SGalinski\SgYoutube\Service\CachedImageService;
 use SGalinski\SgYoutube\Service\YoutubeService;
@@ -31,7 +31,7 @@ use TYPO3\CMS\Extbase\Mvc\Controller\ActionController;
 use TYPO3\CMS\Extbase\Service\ImageService;
 
 /**
- *  The Youtube Controller
+ *  The YouTube Controller
  */
 class YoutubeController extends ActionController {
 	/**
@@ -66,10 +66,11 @@ class YoutubeController extends ActionController {
 
 		$filterIds = explode(',', $filterIds);
 		foreach ($filterIds as &$filterId) {
-			$filterId = trim($filterId, " ");
+			$filterId = trim($filterId, ' ');
 		}
+		unset($filterId);
 
-		$maxResultsWithFilters = (string) (intval($maxResults) + count($filterIds));
+		$maxResultsWithFilters = (string) ((int) $maxResults + count($filterIds));
 
 		try {
 			$jsonArray = $this->youtubeService->getJsonAsArray($id, $maxResultsWithFilters, $apiKey);
@@ -77,7 +78,7 @@ class YoutubeController extends ActionController {
 			$jsonArray['items'] = array_filter($jsonArray['items'], function ($item) use ($filterIds) {
 				$videoId = $item['snippet']['resourceId']['videoId'] ?? $item['id'];
 				if (is_array($videoId)) {
-					$videoId = $videoId['videoId'];
+					$videoId = $videoId['videoId'] ?? 0;
 				}
 				foreach ($filterIds as $filterId) {
 					if ($videoId === $filterId) {