Jersey Boys is a jukebox musical with a book by Marshall Brickman and Rick Elice. It is presented in a documentary-style format that dramatizes the formation, success and breakup of the 1960s rock 'n' roll group The Four Seasons. From Wikipedia
The clip spotlights the Tony nominee performing “Song on the Sand” as final rehearsals progress for the Muny cast with participation by the Teens ensemble before the August 8 premiere.