I loved my LG Phones, once they gave up on making phones I moved on to iOS. There was always something nice about each model. The LG G2 had an IR at the top of it, so it was a universal remote control, it doesn't age very well (wife still has hers, but you cannot see the screen), but it was at its lifetime / prime an amazing phone, the only change I would have done is add an SD card to it.
The G5 was another great phone, I believe it was designed to be a "modular phone" the bottom would come out letting you take the battery out, but it could also add an attachment to the phone, I never did buy an attachment though, and I think the last one I had was the G7.
I enjoyed their tablets too.
For some reason people cling to other brands, and slept on LG which made some really decent Android phones.
Both my G5 and G7 still turn on, I always say that by the release of the G7 (I forget the year) and possibly the G5, all decent quality smartphones got to the "good enough" stage of smartphones where it feels like I could own one for more than just 2 years before it shows signs of wear.
Direct link to video: https://youtu.be/vDMpANNGND4
The site also puts two non-youtube video ads in front of the youtube video so you can't just watch it.
But it (looking at the demo innards) doesn't add much of anything you wouldn't get from watching one expand and comparing that to opening a foldable?
Interesting video, but it didn't tell me why rollable phones aren't a thing. It doesn't appear any more flawed than the foldable concept.