Most of the time, it’s critical to keep your vehicle’s tires inflated properly at all times. On the road, appropriately-inflated rubber ensures an even, flat contact patch providing optimal traction which is what you need to stay safe.
However, when heading off-road where the ground is no longer even, the need for a flat contact patch is useless. The thought process is elementary: The less air pressure in the tires, the more they can conform to the terrain. Your tires can wrap around rocks and other obstacles easier because having less air pressure makes the tires more malleable.
As stated in the videos, airing down your tires too low can cause the tire to come off the wheel which can make for a bad day, especially for a novice.
Beadlock wheels are the reasonable remedy for this problem but they’re not for everyone. Beadlocks aren’t street legal in all states and are usually reserved for the most extreme trail riders. With that in mind, if you’re running traditional wheels and off-road tires, you want to be conservative in how low you air down your tires. Also, airing down your tires creates the problem of airing them back up when you are finished on the trails. The best (but fairly expensive) solution for this is an onboard air compressor.