The first question is, why are you using other people's content? A copy right claim means that someone has made a content claim on part or all of what you have uploaded. YouTube must have sent you to their copyright school. You need to take the course and watch videos about copyright infringement. There is a fair use policy for content, but this is most of the time abused by YouTubers as contents are uploaded without any adaptation.
I don't know what your content is as I couldn't open your channel. My advice is for you to start creating your own videos. It is painful for a YouTuber to spend hours filming and editing only to have their content appear on another person's channel without their permission.