Remove "Movavi video editor plus" sign from the video apart from that correction, Iwould suggest: making the video still-image a cute anime girl not even tangentially related to song in a provocative pose to draw in more views, changing the "nightcore" in the title to Hironightcore or Juncore. After that though maybe do more modern/popular songs first then try to go for the "oldie but a goodie" sort of songs. You know basic branding. If you feel particularly motivated maybe work on remixing or making the song better~? Other than that, I subbed, lets see if you actually have it in you to make more or improve.
