From the description:

Much Ado About Nanites is a brief yet delightful featurette that delves into the quirky world of the Nanites—those microscopic, self-replicating bots introduced in Season 8 of MST3K. This segment offers a behind-the-scenes look at how these tiny characters were brought to life, combining episode clips with insights into their creation and role aboard the Satellite of Love

Star of "Mitchell" and "Final Justice."

RIP, big guy.

From the description:

This 9-minute featurette, produced by Ballyhoo Motion Pictures, offers an insightful look into the 1967 biker film Wild Rebels, famously riffed in Mystery Science Theater 3000 Episode 207. Featuring interviews with director William Grefé, lead actor Steve Alaimo, and film historian Chris Poggiali, the documentary delves into the film’s production, its place in 1960s exploitation cinema, and its enduring cult legacy.

Originally included in The Mystery Science Theater 3000 Collection: Volume IX, this behind-the-scenes look is now available on the official MST3K channel.

From: Experiment 208 Lost Continent

From the DVD extras for "The Screaming Skull."

Rae Dawn Chong reflects on her role in the post-apocalyptic cult film City Limits, which later gained new life through its appearance on Mystery Science Theater 3000.

From the description:

Take a peek behind the curtain with this collection of rare outtakes, unused footage, and behind-the-scenes moments from the making of the 1992 special This Is MST3K.

From the description:

Originally featured in the Manos: The Hands of Fate DVD, Hotel Torgo is a 2004 documentary that delves into the making of one of the most infamous films ever riffed on Mystery Science Theater 3000.

Bernie, who played the male teenager in the car and served as a stuntman, cameraman, and key grip, shares candid and often humorous recollections of the chaotic production. His stories provide a unique glimpse into the challenges and eccentricities behind the creation of this cult classic. 

As we mark ten years since Bernie’s passing in April 2015, we honor his contributions to Manos and his role in preserving its legacy through this documentary.

From the description (sadly no mention of being kicked in the shins by a small red robot):

Writer/Director Greydon Clark sits down to discuss Final Justice and its appearance on Mystery Science Theater 3000.

From the description:

Meet Steve Vance, Mystery Science Theater 3000’s Artist in Residence. In this featurette, Steve discusses his creative process, the inspiration behind his artwork for MST3K, and what it means to contribute to the show’s visual identity. From DVD cover designs to poster art, explore how his distinctive style helps bring the MST3K universe to life.

From the description:

Actor Ross Hagen reflects on his starring role in The Sidehackers, how it was made, and Crown International Pictures' involvement.

From the description:

Ever wonder who’s behind those quirky and creative MST3K DVD menus? This behind-the-scenes featurette takes you inside the process of designing and animating the interactive menus that have become a fan favorite in their own right.

From the description: Joe Estevez reflects on his role in the cult classic Soutalker and his experience being featured on Mystery Science Theater 3000. With humor and honesty, Joe talks about the making of Soultaker, his reaction to the MST3K treatment, and what it’s like to be part of the show’s unforgettable history.

From the description: "We hope you enjoy this fun and insightful conversation with actor Thom Christopher (Troxartas), originally featured in the DVD extras for MST3K Episode 703!"

Talkin' 'bout Manos, the... Hands of Fate.

Behind the scenes stories from the Pumaman himself!