Mark Smitelli has poked around at the system, uploading copies of the copyrighted song "I Know What Boys Like," sonically altered in various ways: compressing or expanding the time, lowering or raising the pitch, adding noise, etc. Mark runs the complete results, but to roughly summarize: Altering parameters more than 5% often seems to fool the Identifier, and using less than 30 seconds also seems to let the clip slip through the rule-bound robot's shiny little nets. Playing clips in reverse confused the Identifier, but stripping out everything except the vocals did not.YouTube's automated copyright filter
Using a clip for as satire or political commentary undoubtedly wouldn't keep it from the Identifier's snares, although such use is likely protected and non-infringing. The Identifier, unsurprisingly, seems to be a poor reader of human intention. [Thanks to David Abrams for the tip.]
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.