The Making of The Matrix (1999)
https://www.youtube.com/watch?v=8ufqaDx4iuQ&list=PLYn2a0e2FVIJ66EP8vMU64l-kIhHU9zg7&index=4&t - from the Andrew Rayner YouTube channel (26 mins long).
The blurb:
“A promotional making-of documentary for the film Matrix, The (1999) that devotes its time to explaining the digital and practical effects contained in the film.”