Reused content refers to repurposing someone else's content without adding significant original commentary or educational value.
This policy is taken from AdSense program policies and applies to your channel as a whole. If you have many videos that violate the guidelines, monetization may be removed from your entire channel.
What can be monetized
YouTube allows reused content if viewers can tell that there’s a meaningful difference between the original video and your video.
Using clips for a critical review
A scene from a movie where you’ve rewritten the dialog and changed the voiceover
Replays of a sports tournament where you explain the moves a competitor did to succeed
Reaction videos where you comment on the original video
Edited footage from other creators where you add a storyline or commentary
What can't be monetized
Reused content is not based on copyright, permission, or fair use. You may have permission from the original creator and not get claims against your content, but your channel may still violate the reused content guidelines.
Clips of moments from your favorite show edited together with little or no narrative
Short videos you compiled from other social media websites
Collections of songs from different artists (even if you have their permission)
Content uploaded many times by other creators
Promotion of other people’s content (even if you have permission)