I don’t need your opinion because you don’t own the idea.
Let’s say… Steve started reaction videos. Not everyone who makes a reaction video has to go to Steve and say “Oh, hey, can I use this?”. They don’t.
I don’t need to go to Charles Dickens old house and ask his spirit if I can make my own rendition of A Christmas Carol.
I can and will make my own video, and you claiming you “copyrighted the idea”, One, isn’t possible https://www.writersdigest.com/online-editor/can-you-copyright-an-idea (see there), and two, is a bit self-centered, thinking that you making a spinoff version of YouTube rewind is your own idea to copyright.