Embedded video messes up post

Hi there,

I have a problem with videos on my blog. Whenever I embed a video it shows up fine on the start page of my blog:

http://www.phil-mickelson.com

However, the design of a post with a video in it gets completely messed up by the video, e.g.

http://www.phil-mickelson.com/2008/phil-scores-hole-in-one-at-scottish-open/

Does anyone have an idea why this happens and what I can do to resolve the problem? Thanks a lot in advance.

Lars