Is This The Next Viral Smash Song… Or A Joke?

I happened to see this video, entitled "Summertime Is Great" earlier today and I can't for the life of me tell if it's a legitimate song, like Rebecca Black's "Friday" from a few years ago, or is an elaborate joke, meant to go "viral" online.

Take a look (if you can bear to watch the whole thing, that is...), and let me know what you think!