Well it looks like you have the video displaying over the background content but by the z-index it should be displaying beneath it (z-index 0 will display below z-index 1). When z-indexing Flash you will need to use one of the non-windows modes in your Flash player parameters like:
<param name="wmode" value="opaque"/>
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Window Mode (wmode) - What's It For?
There are three window modes.
In windowless modes (like opaque), Flash Player doesn't have a hWnd. This means that the browser tells the Flash Player when and where to draw onto the browser's own rendering surface. The Flash movie is no longer being rendered on a higher level if you will. It's right there in the page with the rest of the page elements. The Flash buffer is simply drawn into whatever rectangle the browser says, with any Flash stage space not occupied by objects receiving the movie's background color.