I've heard that the band performing this version of Metallica's "Enter Sandman" was performing at a wedding, which (were it true) would make this video 100% better, particularly if it were done without the wedding party's knowledge.
In any case, this is a pretty quality version of the Metallica standard, and it makes me long for more jazzy, relaxed covers of metal songs—similar to what Andy Rehfeldt does on his YouTube channel.