Unfriended was that 2014 supernatural horror film that was set entirely on a computer screen, and was exactly both as fun and as dumb as you'd expect it to be.
Sad13 is the dark dance-pop side project of Sadie Dupuis, the singer/guitarist of indie band Speedy Ortiz.
Combine those two things, and you have a pretty cool and entertaining way to film a music video that during a coronavirus quarantine.