YouTube has a Copyright Tips page where they talk about "using some copyrighted content in your videos."
"While videos that are direct copies of someone else's content are clear copyright violations, there are certain very limited circumstances in which the use of very short clips of a copyrighted video or song may be legal even without permission. This is known as the "fair use" principle of copyright law.
To determine whether a particular use of a short clip of a copyrighted video or song qualifies as a "fair use," you need to analyze and weigh four factors that are outlined in the U.S. copyright statute."
On YouTube's Copyright Tips page, they provide Fair Use Links on the Web:
See the video: In Defense of Greg Solomon, Victim of a Frivolous DMCA Pt. 2
Zizzle Zoundz! This is the toy at the heart of the biggest YouTube drama of all time!
also see In Defense of Greg Solomon, Victim of a Frivolous DMCA
and Lady, you've just been Zizzled! "Renetto's Toy" gets DMCA'd! See Video
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