Appreciate the tag. If you upload content from multiple sources, or reupload/repurpose someone else’s existing content (ie “reuse content”) then you won’t be eligible for YPP. More here: https://yt.be/help/reused-content … & you can always reapply in 30 days.
Reused content usually happens when a channel lacks context or info about the creative value added to make the content unique. We’d recommend making changes that focuses on transforming the original work that’ll give it more context.