i think George Harrisons Song "my sweet lord" was very similar to "hes so fine" performed by the Chiffons. the melody , harmony, rhythm etc was all very similar so he was i gues rightfully charged for breech of the copyright.
Case Study 2
i dont think Universal studios film the 12 monkeys were in any way breeching the copyright laws with the image of the chair suspended on the wall. i dont think it was copying artist Lebbeus Woods's image he drew in 1987. it was just a chair on the wall, had none of the details Lebbeus sketched with the sphereical structure etc. it was just a chair on the wall, big deal.
Case Study 3
i think Keir Smiths work "oh so criminal" was illegal by taking for example popular songs and remixing them for his video. i think it should be covered by the "non commercial share alike" licence so it would allow smith to remix and build upon the artists work non commercailly as long as he credited the artists and licence the item under the identicle terms.
Attribution means: You let others copy, distribute, display, and perform your copyrighted work - and derivative works based upon it - but only if they give you credit.
You let others copy, distribute, display, and perform your work - and derivative works based upon it - but for noncommercial purposes only.
No Derivative Works means:
You let others copy, distribute, display, and perform only verbatim copies of your work, not derivative works based upon it.
Share Alike means:
You allow others to distribute derivative works only under a license identical to the license that governs your work.