Susan Kare and Jerry Manock Explain Mac Ergonomics on Computer Chronicles (1984) (archive.org)

A few hours ago someone posted this link:

  https://news.ycombinator.com/item?id=29379952

which references a YouTube video with just the bit of Susan Kare explaining the basic functions of the Mac UI and some of the reasoning behind it. Stuart Cheifet has mentioned the only legit "free" version of Computer Chronicle content online is what's hosted on the Internet Archive. Also, this link gives you access to the complete show, including Jerry Manock describing the ergonomics of the Mac hardware. Figured I would add it as an alternative to the previous posting.