Mods: Can this be made into a sticky please? Thank you. Doc got one of his videos pulled by youtube because Reuters claimed they had copyright on the footage. On the other hand, these video music compilations of the protests are vitally important to the morale of the protestors in Iran as well as to us here who look on. So I thought I would look up some legal concepts and post them here. If you all find similar information, please share it with us. Thank you. FIRST UP: MASH UP What's mash up? Take two tracks (at least), import them into an audio editor (Audacity is a freebie), synchronize the tempo and the pitch, line up their waveforms, and voila! You have a brand new creation. Mashup: fair use or infringing derivative work? Let us remember what Pablo Picasso said about the creative process: "Artists reference; great artists steal."