Nightcore - it's a sped and pitched up song. I'm not making songs and I'm not remixing them. Original autor of the song is always in the description of video. Nightstep is just a type of nightcore music (nightcore + dubstep). I mainly upload dubstep but may as well throw in other genres. If you want to complain and don't like that type of videos, why are you still here? No hate.