Embedding you tube videos

Hello

 

I am trying to embed the following youtube video in to the course that I am designing.

https://www.youtube.com/watch?v=WJXF1XYWD6s

But I am not able to do so. Though I embedded following link based on the instructions in articulate to embed videos from website

<iframe width="560" height="315" src="https://www.youtube.com/embed/WJXF1XYWD6s?rel=0" frameborder="0" allowfullscreen></iframe>

But once I embed this link and information on the screen says "this page cannot be displayed as system is not connected to the internet. I have checked in the published file too and did not find the embedded video.

I would request any of the community members or staff who might have solved this problem earlier to help.