exchange/app/Http/Controllers/Api/VideoController.php

<?php

namespace App\Http\Controllers\Api;

use App\Models\Video;
use App\Transformers\VideoTransformer;

class VideoController extends ApiController
{
    public function index()
    {
        $video = Video::latest()->first();
        return $this->respondWithItem($video, new VideoTransformer($this->locale));
    }
}