My first computer was also a ZX81 with the 16K memory expansion, I was lucky, mine was not the kit version, after that I upgraded to the Sinclair ZX Spectrum which had 48K ram, a 3.5 MHz Z80 cpu and boasted an 8 colour display.
I think what he means is that when viewing the aircraft in an outside view and when you roll the aircraft the aircraft stays still and the ground view moves.
I wouldn't be using Kaspersky especially after the Russians have invaded Ukraine! In fact I would never trust the Russians to take care of my PC security, bit like asking a fox to look after the chicken coop!