Some diagram of this, never thaught I would see it.
<iframe width="560" height="315" src="//www.youtube.com/embed/qOyzzUShkUs?rel=0" frameborder="0" allowfullscreen></iframe>
<iframe width="560" height="315" src="//www.youtube.com/embed/qOyzzUShkUs?rel=0" frameborder="0" allowfullscreen></iframe>