I did not know that this song could be done with one string, but someone was able to play One with One string. There are a couple times where he layers, primarily since there’s still a lead & rhythm guitar portion to the song. But it appears to be the same string in both instances.
It’s pretty good. It’s not 100% the same, but it’s also not 16% the same, so this guy can do more with one string than Metallica does with 6. I assume that’s how that works, right?
Anyway, you’ve likely heard the song 14 million times already so I don’t need to go into it, so enjoy!