That is slightly odd. He repeatedly says this is the smaller battery, and that it's 51 KWh. But several times I saw that the car he's driving has Trophy spoilers on it. Also, at one point he seems to be on a fast type 2 charger and it's getting more like Trophy charge speeds from it (I think).
Another interesting thing is that in that car the central screen's battery charge display seems to be working properly, in that it goes amber when it's below somewhere around 50% and red when it's below maybe 20%. There have been various hints that that's how it's supposed to work, but in most of our cars it stays green and only comed up amber at random sometimes just for the hell of it.
I saw amber apparently for real on mine when the charge got below 5%, never red. In another of Bjorn's videos the car he's driving is doing that too. Amber when very low, and never red. Another bug I think.