Autoblog YouTube

Hi

I need to control the output size of the video.

Currently I get a 900×506 video ..thus killing the layout of site

please explain hoe and exactly where to limit or fix the output size of the youtube embed

thank you

please see for example

http://ningboexpat.com/my-125-gallon-reef/

code: <p><iframe width=”900″ height=”506″ src=”http://www.youtube.com/embed/uepuFYCKw0c?fs=1&feature=oembed&#8221; frameborder=”0″ allowfullscreen></iframe></p>

Eckhard