Put it near the very end of an edit, right after the reveal or the final message, then follow it with Hello Darkness My Old Friend before cutting to black.
About this sound
This five-second clip lifts the 'Where are you, and I'm so sorry' line from Blink-182's I Miss You, sung in a soft, wounded tone that stretches the apology out. It feels lonely and melodramatic, with a wistful pull that can turn a small moment into something theatrically sad. The line comes from the band's 2003 untitled album, where listeners kept returning to that heartfelt plea.