Okay, @yisusth also thought that I sang with the track, however, I don't sing along with tracts but only the instrumentals of a song.

I'm my video, I edit my voice by duplicating it so it would sound like harmony. The original song has no backing vocals, so I just sang the same way twice and edited it in my video.

So the entry isn't a karaoke because I wasn't singing along with the original artist. All through from the beginning to the end, I was the only one singing.

@musiczone you can listen to the video again.