Denmark’s best-known psychedelia rockers Oh No Ono dress in bright, crazy outfits and try to cram as much ornate tinkling as possible into their baroque tracks. “Swim,” which may be the 21st century’s best chance at its own “Bohemian Rhapsody,” is a sweeping complex pop track that winds from a sparely-placed falsetto vocal into an orchestral arrangement that feels majestic. This video is equally masterful — a linear narrative of childhood’s weird moments of longing and misunderstanding.