Dear @YouTube @TeamYouTube, Thank you for letting me know about my channel's Ineligibility for monetization. But I would appreciate it if you would specify what you classify as 'Reused Content'. I have gotten rid of my reaction videos but I am not sure if that is sufficient.
While we can't get into specifics, here's more about reused content & how you can avoid it: https://goo.gl/E5dgGo . Also, you can always reapply for YPP in 30 days from the time you received the decision email. Hope this helps.