Very interesting contrasting visions between IBM's hierarchical approach and Englebart's Mother of All Demos. The IBM vision isn't really even computing based. it's obvious from the video which shows an on-demand point-to-point analog video link between a senior executive's office and a central reference library. The video is only from the library to the executive but the audio is bi-directional allowing the researcher to receive requests, assemble materials which could include documents placed on a video camera stand, transparencies, microfilm or the display output of a video terminal and then display them on the video feed using a video source switch box. It's really more a demo of a dedicated corporate video calling system.
> Dunlop’s 1968 video demonstration of the Executive Terminal and the Information Center proceeds in three acts.
The article doesn't make this clear but the linked videos are not a video demonstration but instead unedited B-roll shots without audio probably captured to be cut-aways edited into a narrated video demonstration. Unfortunately, that video demonstration isn't part of this collection (or was never created).