Video - Snapchat Mystery: The Voice from Beyond

so it started off a few months ago and I was in my garden just playing basketball, I have headphones on and I’m listening to my Spotify playlist. Now my friend snaps me with a filter on Snapchat and I go to reply and when I open the app it’s on the camera. So Im going to send a snap back but then I flip the camera so that it’s facing me and I can hear a deep voice mumbling words and all I could make out was “Underdog” and “Open”. I obviously thought that Spotify was glitching so I paused the song and opened the camera on snap again and the EXACT same mumbling voice came again and this time I could make out a couple more words “Drive” and also “Toxic”. Now I have no idea how any of those words relate to each other. Anyways I just let it go as it didn’t happen again for a while until 2 months later and now every time I open the Snapchat camera and my volume is on there is mumbling of a deep voice. I genuinely don’t know how this has happened so if anyone knows please tell me.