Big companies have a big part of making the copyright rules on YouTube. People also misuse the system. Just because you can doesn't mean you should.
EDIT:
They talk about some changes in the copyright thing on YouTube 22 minutes in the video:
https://www.youtube.com/watch?v=442cs8TjKlc
EDIT:
They talk about some changes in the copyright thing on YouTube 22 minutes in the video:
https://www.youtube.com/watch?v=442cs8TjKlc