Where can I find a legitimate source to cite stating transformative works are not copyright infringement?

I need legitimate proof from a legitimate website stating that transformative works are not grounds for copyright infringement claims. I had a video taken down off youtube and I'm hoping to get it back up if it technically does not fall under copyright infringement. So basically nothing like wikipedia or... show more I need legitimate proof from a legitimate website stating that transformative works are not grounds for copyright infringement claims. I had a video taken down off youtube and I'm hoping to get it back up if it technically does not fall under copyright infringement.

So basically nothing like wikipedia or small school websites and such.
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