Youtube Videos Not Working??

Hello,

I have been trying to add Youtube videos to my website. I followed the directions from the .com website on how to insert the video into my post. When I paste the URL into the video URL bar, the video code is displayed in my post as: https://www.youtube.com/watch?v=Ln5ofL_xknY

Which is not correct from what the directions read. When I visit my site after inserting that URL, only the link appears in the body of the post as a link but with no video to view.

Anyone know what this is about?