Todd Spangler NY Digital Editor Anastasia Radzinskaya, the 9-year-old better known to millions of YouTube fans as “Like Nastya,” is swimming to the big screen. Nastya has boarded animated feature film “Weird Waters,” set to voice Jam, a precocious neon tetra who embarks on an undersea adventure with two best fish friends forever (BFFFs) — and must discover the hero within. It marks her first big-screen project.