This documentary, produced by Paul Burnford, features how products are made in factories. It uses an example of a jack-in-the-box produced by Mattel.
Streaming availability for US region, via JustWatch.

The Making of 'Terminator 2: Judgment Day'
1991

No Half Measures: Creating the Final Season of Breaking Bad
2013

Beyond Infinity: Buzz and the Journey to Lightyear
2022

Seduced and Abandoned
2013

Aquaman: Heroines of Atlantis
2019

Avatar: Creating the World of Pandora
2010

A LEGO Brickumentary
2014

John Candy: I Like Me
2025

Obi-Wan Kenobi: A Jedi's Return
2022

As I Was Moving Ahead, Occasionally I Saw Brief Glimpses of Beauty
2000