Imagine if Toyota patented the concept of the wheel and then decreed that Ford cannot use wheels for their cars. I know this is a crazy illustration but my point is copyright, patents, trademark, etc, can go overboard.
Oh, imagine if bottled water companies patented water and declared using water illegal as water is used in their products. But I already got water inside my body. So, I guess I have to die or give the money or go to prison or something.
I use these insane illustrations to highlight how ideas can be similar to other ideas. People steal ideas from each other all the time. But doing so can make things better. Also, it can take a lot of work to take a product, add something to it, and sell it. YouTube would include an exception to copyright that if it is transformative then it may be dismissed or whatever.
When I was 13, I took a firefly and cricket stuffed animal and made a comic out of it. It took me a lot of work to put together my Action Strip or Action Stripe. But imagine if those two stuffed animal figures were copyrighted or whatever. Sadly, that would be a punch in my hard work.
I find copyright to be a violation of the free market.
RE: You cannot take away from the author that which does not belong to the author.