Question: What did Nirvana do differently with "In Utero" that caused a documentary to be made about recording the album?
Sentence (from "Nirvana – A Classic Album Under Review – In Utero"): Nirvana – A Classic Album Under Review – In Utero (also known as Nirvana's In Utero) is a 2006 music documentary released exclusively to DVD dealing with grunge band Nirvana's third studio album, "In Utero".
Relevant evidence: Yes