ext_localconf.php

<?php

/***************************************************************
 *  Copyright notice
 *
 *  (c) sgalinski Internet Services (https://www.sgalinski.de)
 *
 *  All rights reserved
 *
 *  This script is part of the TYPO3 project. The TYPO3 project is
 *  free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  The GNU General Public License can be found at
 *  http://www.gnu.org/copyleft/gpl.html.
 *
 *  This script is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  This copyright notice MUST APPEAR in all copies of the script!
 ***************************************************************/

if (!defined('TYPO3')) {
	die('Access denied.');
}

\TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
	'Srectorprefix20211231gYoutube',
	'Youtube',
	[
		\SGalinski\Srectorprefix20211231gYoutube\Controller\YoutubeController::class => 'index',

	],
	// non-cacheable actions
	[

	]
);

//include Plugin sg_twitter
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPageTSConfig(
	'@import "EXT:sg_youtube/Configuration/TsConfig/Page/NewContentElementWizard.tsconfig"'
);

//Register Icons
$iconRegistry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Imaging\IconRegistry::class);
$iconRegistry->registerIcon(
	'extension-sg_youtube',
	\TYPO3\CMS\Core\Imaging\IconProvider\SvgIconProvider::class,
	['source' => 'EXT:sg_youtube/Resources/Public/Icons/youtube.svg']
);

//Hooks
$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['cms/layout/class.tx_cms_layout.php']['tt_content_drawItem']['sg_youtube']
	= \SGalinski\SgYoutube\Hooks\PageLayoutView\PluginRenderer::class;