Why does SE hate youtube?

[azethoth]

well regardless of what they think or say, there is something called fair use. One of the qualifications of fair use is that if the work is transformative enough than their copyrights are not violated. There is a 4 step process for determining fair use that courts use. This is why things like fan fiction are usually legal. Youtube just makes it easy for false DMCA claims to run rampant.
http://www.copyright.gov/fls/fl102.html

Section 107 contains a list of the various purposes for which the reproduction of a particular work may be considered fair, such as criticism, comment, news reporting, teaching, scholarship, and research. Section 107 also sets out four factors to be considered in determining whether or not a particular use is fair.

The purpose and character of the use, including whether such use is of commercial nature or is for nonprofit educational purposes
The nature of the copyrighted work
The amount and substantiality of the portion used in relation to the copyrighted work as a whole
The effect of the use upon the potential market for, or value of, the copyrighted work

sorry copyright abuses get me going.