What you want to look for is middle/high schoolers who are
a) dressed in dark and wearing their hoods or
b) singing dramatic songs or
c) are boys singing a girly song or
d) have disclamers about their performance (ie "OMG my hair was still wet from the shower and I had a sore throat so plz comment nicely but be honest. not my best song, but it's one of the hardest to sing.)
I encourage you to try and see what you find. I am also accepting requests for what you would like me to video myself singing so I can post it on YouTube.