You should know it's a cover that he decided on, arranged, and rehearsed in less than a day, together with a bunch of other covers, because this whole performance was only confirmed two days prior, when the original artists had to pull out of the music festival at pretty much the last minute due to covid and the organizers asked if he could stand in. Also, note that the guy was still recovering from his own bout of covid prior to this performance. Oh and the G in Gnu is silent. ;)