Tailed Beast Counting Song, with English and romaji lyrics. Also with the video in the corner.
Original video credits: Masashi Kishimoto (creator of the Naruto manga)
If you think that one is annoying/disturbing, please watch this: ua-cam.com/video/bnYQ4jnR6Iw/v-deo.html
The lyrics are from naruto.wikia.com/wiki/Tailed_Beasts_Counting_Song