No sure what video you're referring to, but unless you're on crazy terrain, you shouldn't need to deflate tires. I just keep mine at 55 for most rock trails and I can get over nearly anything even without the diff locker on.

The big problem with the Cybertuck is that it comes from the factory with both diff lockers disabled. That makes zero sense. Why are they going to enable a physical locker with a software update? Unless it's not a physical locker? I can't find any real info on how the drive train actually works.

The other issue is that the cybertruck is fucking heavy. You don't take an F-250 off-road, or a Tundra. People typically buy big trucks to tow boats. They're great at that, but terrible offroad. The Cybertruck weighs as much as a F-250/Tundra/Titan, but has no where near their tow capacity.