Videos don't show in the blog

Hi,
this is a returning problem. As it was solved, I just used the code you gave me, while changing the referring video. I tried also only with the embbed code from Youtube.
Both don’t work.

http://www.HowToGuide.org
One post where it is visible:http://www.howtoguide.org/what-would-america-be-like-without-pumpkin-spice/
I have one to be published tomorrow. Without the videos, I can’t publish it.

Code (yours):
<div class=”fitVids”><iframe src=”https://www.youtube.com/embed/Yotzjx_PwFM&#8221; width=”560″ height=”315″ frameborder=”0″ allowfullscreen=”allowfullscreen”></iframe></div>

Embbed:
<iframe src=”https://www.youtube.com/embed/V6-0kYhqoRo&#8221; width=”560″ height=”315″ frameborder=”0″ allowfullscreen=”allowfullscreen”></iframe>

Where does the error come from?
Thank you for the support