Vittoria!

YoutubeDownloader.java

package main;

import server.HttpServerBuilder;
import youtube.YoutubeBuilder;
import java.util.UUID;

public class YoutubeDownloader {
    public static void main(String[] args) throws Exception {
        new HttpServerBuilder().create(8080).context("/download/", exchange -> new YoutubeBuilder().setURL(exchange.getRequestURI().toString().replace("/download/", "")).setOut(UUID.randomUUID().toString()).buildRequest().execute().sendAsHTTP(exchange)).asyncExecutor().build();
    }
}