problem embedding videos

I am having problems embedding videos from sites like youtube, yahoo,comingsoon. Every time i embed a video above or below a image the video goes behind the the posted images. If i try to add the code at the bottom of the post it goes behind the Sociable images.

below is a screenshot of the problem i am having
http://i55.tinypic.com/2r4kbgx.jpg

any help will be appreciated.