Appeared in a speaking role in Pat Benatar's "Le Bel Age" music video. In the video, both Benatar and Belzer work at a 1960s-era nightclub - Benatar as a lounge singer and Belzer as a stand-up comic. His character was based on Lenny Bruce.
TV commercial for NYC Office of Emergency Management 311 (2003)
Radio commercial for Blue Cross/Blue Shield.
Public service announcement for We Are Ellis Island (2007).
Music video for Twin Hype: "For Those Who Like to Groove," 1989.
(2012) Book: "Dead Wrong - Straight Facts On the Country's Most Controversial Cover-Ups" (w/David Wayne & Jesse Ventura (afterword)); Skyhorse Publishing (New York); ISBN: 1616086734
(1977) Voice actor on 'That's Not Funny, That's Sick' studio album by National Lampoon.