How to Monetized eligible cover videos on YouTube

I uploaded a video fron Just Dance Now game on iPad wit song like 99 Luftbaloons and saw this tab “Monetize my video.

YouTube video cannot be monetized right now- August 27, 2013

YouTube video cannot be monetized right now- August 27, 2013. You cannot edit the video as well since according to You

YouTube partner reporting in AdSense Update

On 1 April 2013, YouTube Adsense program made some changes to the way that they report earnings for YouTube partners.