The first of six music videos Lou Barlow has promised for Goodnight Unknown, due October 6, shores up the grim, modest, and altogether wonderful “Don’t Apologize” with a bit of DIY sci-fi: A colorfully lit colander lands on a small dwelling at night, depositing a praying mantis with its antennae trained on the curiosities around it: a guitar propped against an amp, a light fixture, a furry, inert native. It’s Signs meets Welcome to the Dollhouse. (We haven’t seen District 9 yet, so we can’t speak to the similarities there.) At some point we see Barlow himself, although unfortunately he’s merely abusing a regulation-size acoustic guitar, and not peering, ogrelike, through a tiny plastic window. Your move, Yo La Tengo.