How to post videos that use pieces of copyrighted content

[bendermac]

Actual copyright strikes are rare. You may get a content id claim. That means all revenue generated goes to the right holder or those who claim to be so. Your channel wont be affected. But if you change the work a lot, you can do a counter claim for fair use.
The other issue that may happen is that your video gets blocked. Can be a single country or the whole world.