Add logic to a video download page to detect if visitor is a paying member (if not take away options)

Hello, I have a poker training site where users can stream or download videos from poker pros. I currently offer the following formats: * streaming FLV * streaming HD FLV * WMV * iPhone * iPad I would like to put some logic on the page to not offer WMV/iPhone/iPad options if they are not a paying member. The video player is in flash/php and those links are generated dynamically after checking to see if we have versions of those videos on the server. So some of the logic is already there. Here is an example page where this occurs: <[login to view URL]> Thanks