Hello Miller, 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. Check out the FAQs and best practices here: https://yt.be/help/reused-content … and you can always reapply in 30 days.
We appreciate the changes you've made – as of the moment, we're not seeing enough public videos on your channel. Due to this, you may not be eligible for a review at this time. We suggest making more videos and try switching private videos to public: https://yt.be/help/YPP-review