A better version of this video is on My Other Channel(tm): https://www.youtube.com/watch?v=nkjwZ...
This video is part of a series detailing the operating systems created by NeXT Computers, Inc. (later NeXT Software, Inc. and then Apple) that are available for Motorola 680x0, Intel i386, Sun SPARC, HP PA-RISC, and Apple PowerPC computers.
This particular video details OPENSTEP Release 4.0, first seen in 1996.