It's Scaring Zach Jumpscare

Zach Smith (AKA ABSIV) from indie rock band Pinback, playing the bass really fast, with the scary woman (AKA Face of Death or Pazuzu) from The Exorcist popping onto the screen, as if coming from his bass-playing, next to the Genius lyrics page of the Pinback song, Grey Machine, saying "It's scaring me"