I understand you are trying to help. But I would prefer someone with a solution or technical knowledge to respond. Please dont make assumptions if you dont know.

Let me put this in simple terms:-
1. The ads immediate url is the google url for ads before redirecting to the advertisers own page
2. The ad is the one displaying WITHIN the player at the bottom. The player is fine for the first few seconds until this ad displays. As soon as this ad display, the player shifts to the right.

And lastly, it has been discussed here as well http://groups.google.com/a/googleproductforums.com/forum/#!category-topic/youtube/watching-videos/A-9uDkYpyD0

EXACTLY the same problem.