Was gonna say, sounds like they're claiming the AI only wrote the lyrics, so I guess humans wrote the music. Then I realized AC/DC music is probably the easiest thing to train an AI on. If AC/DC can't come up with more than one melody for their lyrics, we probably shouldn't hold computers to such a standard.
I mean, sure, I'd be willing to bet some foldin' money that this was like the 100th iteration and humans chose it as the lolziest output. As long as I can read this video as poking fun of AC/DC, I'm supportive of it! That's the main thing.