Ask any two music fans what qualifies as yacht rock, and an argument is sure to ensue. Does Steely Dan count? (Absolutely.) What about Hall & Oates? (No, too East Coast.) In the late 1970s and early '80s,

A nonfiction music film based on a web series that was based on a joke, “Yacht Rock: A Dockumentary” isn’t really about a genre of music as much as it is a bunch of highly skilled musicians who helped make a catalog of expertly produced pop records in the ’70s and ’80s.