That's horrible. Someone with busy fingers and a vivid imagination just replicated the vocal into harmonies. And they're often the wrong notes. Yeeeouch.
Mercury's sense of harmony was far superior to that, nor would he over-do a song like that.
So I vote "nay".
It sounds like you're listening to it through earphones, but the earphones are broken or not plugged in properly..the terrible ''Misfire(Unpublished Demo)'' springs to mind.