iTunes Cracked DVD Jon has done it again. Four years after cracking the DVD security system, allowing DVDs to be copied and spawning a small industry that produces and markets DVD copying programs, he's cracked Apple's MPEG-4 security, allowing MP4 files playing in QuickTime to also be streamed into an unprotected file. His program, QTFairUse, was released as an open source project on the internet last week.