Flash video in popup, dependent on selection on website

I have a client - his business is catalog/internet sales of fine dolls and collectibles. On his website, each product has its own page, with photo and information. What he wants is to add a link which, when clicked, will open a new window that displays a short video that shows off the product.

What I need to know is this: would it be easier/more efficient to create a “viewer app” via Flash, that calls the video via XML, or would it be easier/more efficient to just create Flash video that is called using a server-side script like PHP?

thanks!

(Pardon the double-post, but I’m not sure exactly where to put this question.)