let age = prompt('Сколько тебе лет?');
alert(`Тебе ${age} лет!`);
let age = prompt('Сколько тебе лет?');
alert(`Тебе ${age} лет!`);
<iframe
width="560"
height="315"
src="https://www.youtube.com/embed/e-5luAo20ss?controls=0"
frameborder="0"
allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
allowfullscreen
></iframe>