copyright videos

Reposting videos must be a good strategy because so many channels are getting millions of views, but how are these channels able to pass the monetization review if they are uploading all these copyrighted videos?! Would they not get tons of duplication matches and content ID matches? And what...

I am planning on making a video that involves using other people's content, with a small inclusion of something I have to record myself. How can I include other people's content without getting the final video taken down for copyright? I don't know very much about copyright. I know people ask...