Back when Metallica held their annual Helping Hands Concert & Auction earlier this month, the band played two distinct sets: an all acoustic set and then a plugged-in set. Last week we got the pro-shot footage of “Lux Æterna,” the first single off their forthcoming album 72 Seasons, and now today we’ve got the pro-shot footage of the band’s Thin Lizzy cover of “Borderline.”