Hello Everyone

I am developing a Captivate presentation using interactive video backgrounds with slide overlays.
However, I have learned that there is accessibility limitations.   Some of my clients use ‘screen readers’ because of a visual impairment.  (Jaws,  and Dragon)
Is this the case?   Will screen readers no be able to pick up the overlay slide content when it sits on top of a video?
Any tips to get around this would be greatly appreciated.

Cheers
Todd