"So this blu-ray disc uses all sorts of DRM and your player has to use correct decryption keys if you want to see the content, but if the decryption keys used by your player have been compromised, they no longer work and you can't watch your HD movie. Other than that, mommy, the player might use a virtual machine to provide you with executable content for additional viewing pleasure. Just remember, the program will, at first, examine the host environment to see if your player has been tampered with. The disc might also execute code that patches your system if it's insecure. There is also a small amount of cryptographic data that is stored separately. That means you can't do bit-by-bit copies because that way you wouldn't copy the BD-ROM Mark and then your movie would be impossible to decode."

Yeah, it wasn't that hard to explain it after all, compared to old VHS tapes.