Add two video elements and three buttons

Edit the body of the HTML so there are two video elements and three buttons: Start, Call and Hang Up:

        <video id="localVideo" autoplay></video>
        <video id="remoteVideo" autoplay></video>

        <div>
          <button id="startButton">Start</button>
          <button id="callButton">Call</button>
          <button id="hangupButton">Hang Up</button>
        </div>