It's not spam, but it certainly is worthless.
There's something to be said, regarding platforms having a need to project an image of depth and variety, and there was a time when it might have been useful to have something like Salad Fingers hanging around, to fill out the infinite scroll playlist, but let's not pretend that Youtube has a gap like that, needing occupants anymore.
Youtube is eye-to-eye with (or far ahead of) Netflix and Amazon, in that they are active content producers now, and it's out-of-touch to imagine them as a DIY empowerment engine, providing a means for nobodies to bootstrap themselves out of obscurity scribbles we all might hypothetically fawn over for thirty seconds, while checking to see if the infinite scroll will crash our browsers.