LamdaMikel was kind enough to recently point me in the direction of some videos on the history of the Xerox Alto computer and its GUI. One of these was a set of videos (18 in total) on a complete restoration project for this machine. The videos are in HD and even for myself, a non techie, interesting. They are from 8 to 18 minutes in length. If you do watch them I would recommend using 4K video downloader (or similar) to download them to watch on a large screen TV.https://www.youtube.com/watch?v=xPyqQXFC2yw
Ooh thanks so much for pointing out! :)