Changes

   <h1>My Video Player</h1>

   <h1>My Video Player</h1>

   <div class="fb-video"

   <div class="fb-video"

     data-href="https://www.facebook.com/FacebookDevelopers/posts/10151471074398553"

     data-href="https://www.facebook.com/watch/?v=575240843396712"

     data-width="500"

     data-width="500"

     data-allowfullscreen="true"></div>

     data-allowfullscreen="true"></div>