While I don't disagree with much of what you've said about Jobs and the issues around NeXT, I think it would be unfair to characterize NeXT as a failure. It definitely was a transformative machine and influenced much that came later on. Mac OS X is basically the latest version of NeXT which is highly used OS. The "World Wide Web" was built on the NeXTStep because it was easy to build such software on this platform. I'll admit I'm a Next fanboy but not so much to deny the problems NeXT had. (Seriously magnesium infused cases?)
That video you linked to was very interesting. I have a copy of that booklet Paul Rand pulled out in the video. It's a pretty cool document about the logo's evolution.