In this video you'll find the real truth of uploading any kind of other content in 2020. Like cartoons, songs.
There're many video, which will guide you to upload cartoon without copyright. But most of those are fake. That never work. I research for 1 week but nothing happened always got a copyright warning. So, 

Before you try that, Please check this videos ones. You'll find a lot of info and will not be disappointed.