Lol, I honestly didn't even open the video. I just remembered this from ages ago and was trying to find the actual video she made and not some tech news place talking about it. It's unlisted so it was tricky. There was a link from her website about it.
The Rotary Un-Smartphone is a followup to this personal project. It's a production-ready ground-up design with all new parts (yes, the rotary dial too) and many neat bells and whistles.
Pocket-sized (11.0cm x 7.5cm x 3.0cm)
Light-weight (163g [6oz])
Full LTE connectivity. Obsolescence-proof for at least another decade.
Access and call your personal contacts perhapsfaster than with a smartphone
Use your own SIM card with your favorite carrier's "Bring Your Own Device" option
Real (mechanical) ringer bell made gold or silver-coated brass; externally visible
Receive basic SMS messages and send pre-typed messages and numeric strings
2 displays: Front-side OLED for caller-ID and dial entry, and back-side ePaper for contacts display