Array
(
    [0] => https://www.youtube.com/watch?v=16czm16gZ4g
    [1] => https://www.youtube.com/watch?v=mRAgHMxKWXM
    [2] => <iframe width="560" height="315" src="//www.youtube.com/embed/K5yE--t2bJo" frameborder="0" allowfullscreen></iframe>
    [3] => <iframe width="560" height="315" src="//www.youtube.com/embed/pI20HFUfQTc" frameborder="0" allowfullscreen></iframe>
)