Can anyone explain the following in the code?

          <div class="overlayContentWrapper video displayNone" data-id="1" data-url="lJnlgM1yEU0">
            <h5>
              Title 2
            </h5>
            <div class="overlayViewWrapper"></div>
            <p>
              Chupa chups caramels tart carrot cake gum bears bear claw. Topping powder chocolate
              bar dragée. Tootsie roll tart lollipop pastry pi donut faworki danish. Jelly beans
              pudding jujubes bear claw jello marshmallow marzipan. Icing powder jelly beans. Pie
              sweetly rolling topping donut ice cream sweet roll cake a cheesecake. Candy chocolate
              cake gummies powder pudding pie sweet.
            </p>
          </div>

Some sort of placeholder used to size elementS?