Shel is a folk band from Colorado, though now they're going to be known as "that folk band that made a weird cover of 'Enter Sandman' by Metallica." The band's video and rendition of the song have this slow-building intensity to it that comes off initially as kind of quirky, and devolves into this dreamy, strange version of the song by the end.
Of the odd covers of Metallica, this is probably one of the better ones.