YouTube widget making text shift

I have a very simple page with a text box that has words and links and I often like to add a youtube video above one of the links. When I do this, the text shifts up in the browser when it loads despite it looking fine in iWeb. Is there a way to prevent this from happening? If I rarely had to do this, I would adjust accordingly and move on, but I do this quite often and it takes a lot of unnecessary time to keep moving the widget and uploading multiple times until it looks right in the major browsers.

Chrome & Safari seem to shift the text an equal amount. Firefox is slightly different.

Is there a way to put the youtube widget inside the text box instead of on top of it?

Message was edited by: mnbinth