Make videos have the same filename nomenclature as images

[Bryan Kosman]

For the videos (platforms and games) to use the same nomenclature as image media in the sense of - 01,-02, etc.

So if for example I place in the Videos/Platform/ folder the videos NES-01.mpg and NES-02.mpg, they will get randomized in the main Platforms wheel every time the NES one is highlighted.