Generalised change across site?

Dear all,

I want to make a change across a website that lacks a template (www.23nlpeople.com).  There are about 300 pages. It's the little video that isnt showing on the right hand column.

The code of the video is strangely complicated and is different on every page (why the designer didnt use an embedded youtube iframe, i just don't know).  What this means is that a find-and-replace-all isn't possible.

BUT, the code is in the same line position on every page....is there a way to change the html for this video to the preferred one without doing each page individually?

I'm using CS5.5

Thanks in advance,

Andy