Nowadays, most of the protected video and music downloaded online like Windows Media Player iTunes, Rhapsody, Napster, Bearshare , Spiral Frog are all DRM files.

What is DRM? Why do we remove DRM from windows WMA, M4P and WMV?

DRM (Digital Rights Management) - The anti consumer copy protection that prevents you from using music or movies in a way that suits you.  read more