I often embed video and a small tip I picked up is to add this (?rel=0) to your code at the end of your path. This prevents the associated videos appearing and the end of the video, sometimes the content of these links is inappropriate.

<iframe width="100%" height="100%" src="//www.youtube.com/embed/F1PGiIlXsrg?rel=0" frameborder="0" allowfullscreen></iframe>