You don’t have to be a Germanophile to appreciate the 1970s-era cosmic krautrock of Can, who influenced artists such as Sonic Youth as well as the entire ’90s electronica movement. That said, this three-disc DVD/CD offers no easy entrance points for the newcomer. Even the 86-minute documentary provides no helpful context, though the clips from European TV appearances are excellent. Like the group itself, ”Can DVD” is dense, unfocused, and occasionally brilliant. In other words, for hardcore fans only.