membership working on multiple installs (not WPMU)

Hi. I have a funny theme. It's really cool, but has some limitation in functionality. I would like to create paid membership sections in it and am wondering if I can have one membership plug in controlling the HOME page or root install directory of a website, that install being a sub directory of the main site.

The main issue is that videos continue to play automatically on the home page, but not sub pages.

Here is what I am working on.

http://FashionFilmsTV.com and http://FashionFilmsTV.com/fashionfilms

I am considering making the subdirectory a new install with more content.