Recommended
The Fabrication of Integrated Circuits
Why people recommend it
An educational overview of how integrated circuits are manufactured, from wafer to wiring layers, recommended over corporate PR videos for genuinely explaining the process.
Watch for: Can be confusing without background; footage may be dated
In their words
I dug up a couple of decent videos that are in fact educational videos and not PR videos:
alex.forencich on electronics.stackexchange.com, Oct 2014. CC BY-SA.