Copyright is the exclusive legal right given to the original creator of a piece of work to use and to give permission for others to use. I think copyright is important because it protects the credit of the original piece of work, but I also think that in some cases it shouldn’t matter. For example if someone is posting a video of a dance rehearsal or a dance performance and it uses a song, I don’t think copyright should matter. It’s not like the person is blatantly trying to steal the song and use it as their own so it shouldn’t matter whether they have permission to use the song or not. That’s just called being annoying.
One copyright issue that I looked up and found interesting was Rogers vs. Koons. Art Rogers was a photographer who shot a photograph of a couple holding puppies. He sold this photograph for use in greeting cards and other products. Jeff Koons was a renowned artist who used Rogers picture to create a bunch of statues. Koons made a large amount of profit off of these statues and Rogers sued for copyright. The outcome is that Koons lost because the similarities were way too close for his work to be considered a parody of Rogers picture. In this case copyright was important because Koons blatantly copied Rogers work and just turned it into a statue.
In a situation where something is used as a foundation to build off of in order to create something different, copyright shouldn’t be a problem because it’s not the same exact thing. There’s nothing wrong with being inspired by something and using it to create something different, but there is something wrong with taking something using it with one change made to it and claiming it as your own.