This video is nerdy, even for me. However, I loved Ceefx and Oracle - they were an exciting addition to a TV, and I still think one of the best news delivery systems ever. While the TV news tends to prioritise storeis where they have good pictures, Ceefax put everything in order of importance.
I also miss page 145 - the letters page. Each day a new selection of (mostly) loons spouting off about something. Yes, I know the web is full of this, but here we enjoyed a tiny, curated set each day. You could read, enjoy, and then go away to do something useful.
Anyway, it's good that someone appreciates how important this archive information is, and makes efforts to recover it for posterity.