DefaultController.php

<?php

namespace App\Controller;

use Symfony\Component\HttpFoundation\Response;
use App\Items\Video;

class DefaultController extends \Symfony\Bundle\FrameworkBundle\Controller\Controller
{
    private $links;

    public function __construct()
    {
        $this->links = [
            'https://www.youtube.com/watch?v=ubrLxJrtcX0'
        ];
    }

    public function index(): Response
    {
        $videos = [];
        foreach ($this->links as $link) {
            $videos[] = new Video($link);
        }

        return $this->render('index.html.twig', ['items' => $videos]);
    }
}