Video question

Ok, when I first downloaded and installed this theme one of the demos that showed up was a post with a video right there on the front page to watch without even having to click on the post. I can’t seem to get any posts to do that now. I have even tried posting the youtube link in the section of the post “Video URL”. All that does is show the link itself out of place at the top of the post.

I deleted all the demo posts a long time ago, so I can’t go back and look to see if there is something there I am doing wrong either.