I am wondering, Why is the Alphabet boards and Google employees haven't been prosecuted for the copyright infringement yet? Denying the copyright is an copyrigh

I am wondering, Why is the Alphabet boards and Google employees haven't been prosecuted for the copyright infringement yet? Denying the copyright is an copyright infringement. They knew he is the original author because he and whoever that person living in Saudi Arabia both use YouTube and they knew he is the one who uploaded it first. This issues happens because YouTube is not responsible for what they did. Also, DMCA cause more harm than good. I really don't understand the law system in US.