I didn't see this mentioned in the video... .
Sometimes it makes sense to search for higher lcd "pixel" count and higher pin count chips even if you know you need a lower amount of segments.
SOME micros have the lcd fixed to specific pins which may share functionality with other stuff like SPI or DACs so for example, you could have a 64 bit micro with 80 segments but if you enable the last "channel", you lose important functionality you need, which can't be mapped to other pins.
The higher pin count may also help if you want to have backup / 2nd options for displays.
For example, may be worth thinking of just using a mass produced grayscale or color LCD that cost under 10$ but which could require a high pin count due to parallel interface
As example 320x240 rgb 2.4" for 6$ each :
https://www.digikey.com/en/products/detail/orient-display/AFY240320A0-2-4N6NTN/13544636similar displays can probably be found on lcsc or aliexpress
If you don't like marketplace products, here's one stocked at 10k+ at Digikey , this Sharp transflective 128x128 lcd :
https://www.digikey.com/en/products/detail/sharp-microelectronics/LS013B7DH03/5300387It's expensive if one is bought, but around 6$ in volume.
There's also a bigger but more expensive version with 400 x 240 resolution :
https://www.digikey.com/en/products/detail/sharp-microelectronics/LS027B7DH01A/5054067 Then it's just a matter how big of a screen your product needs to have