Nick Davis’ high-spirited documentary reveals how a humble Toronto run of the hippie musical Godspell became an historic incubator for modern comedy. Based solely on the bright futures of so many of the talents who formed the cast during the 14-month run — Martin Short, Eugene Levy, Gilda Radner, Victor Garber, Andrea Martin, Dave Thomas, and Jayne Eastwood plus musical director Paul Shaffer — Godspell’s impact and influence cannot be overstated. The improvisational element of the musical itself helped foster a unique sensibility that comedy fans would soon recognize in Saturday Night Live, SCTV, and countless other TV shows and movies. With its deft mix of engaging interviews and animated recreations, You Had to Be There brings this special time back into the present with an irrepressible sense of joy.