L.A.-by-way-of-Chicago’s OK Go has nailed an over-stimulated and cheeky generation’s spirit on two fronts. The band’s dance-pop has gotten a surprising amount of mileage out of slightly campy vocals, fidgety rhythms, and admirable hooks. It’s long been just as well known, though, for its resourceful music videos (most famously “Here It Goes Again,” which featured the quartet dancing and leaping across a set of treadmills), and showed a rather noble dedication to its viral audience by splitting with Capitol Records over video-embedding rights. The independently released album Of The Blue Colour Of The Sky finds the band navigating swampy-yet-shimmery funk-pop with help from producer Dave Fridmann. The band’s latest video, “Last Leaf,” is an experiment in stop-motion that utilizes hundreds of pieces of toast with images laser-etched into them.