Alrighty, so I solved the problem associated with Windows XP deployment of a Phonon application: I've just included every DLL for everything in Qt, and I'll slowly strip out, debug and strip out the waste. Now, the program no longer crashes, which is great, but, it doesn't show video!
It plays sound, moves the progress slider along, but doesn't render any video. The application runs fine, aside from the fact it has no visuals. So, any suggestions?