my corpus callosum is green
That's most likely one of his fans. There are tons of people who imitate his style, as I mentioned.
The description links to a cover of the song belonging to an almost identical channel with the same songs and a few more uploads but with real human vocals. Now, normally I'd find this interesting in an ARG way but coming from him (if it is him) it almost makes me pissed off for some reason, I think it's because he makes perfectly fine content and this just makes it all a bitch to find.