I watched the whole video now and really enjoyed it. You were having such fun! I really like that interior, much brighter than my car, but of course your one is Trophy trim.
The distance is even more impressive considering you had four - er- chunky - guys in the car, and a boot full of luggage. The car was carrying a lot of weight. Imagine how much further it could have gone if you'd got a slim girl to drive it, with no passengers or luggage!
I saw the SoC display change colour, it seems to be behaving correctly in your car. In all the cars in Britain (at least) the display stays green until it gets to 5%, then goes amber. Nobody has ever seen red. Except, occasionally, the display turns amber at any state of charge, at random (I have seen it at 100%), then flips back to green quite quickly.
I'm trying to find out what % figures it's supposed to change at. You think 50% and 20%? Someone with an MG5 (I think) said 50% and 10%, as far as I remember. Just another annoying bug in the software it would cost them nothing to fix. But people in Britain have to complain about it.