The vehicles have on-board compressors for reinflation, but the squidgy tyres can get pulled off their rims, making reinflation difficult. (At least, that was true then: perhaps they've developed ways of preventing that now, since the above, more recent article, makes no mention of this.) A squirt of petrol (I think) and the tyre went back on with a bang, as in your video. I can't remember how they lit it, but rather them than me.We’d already dropped the tyre pressures of our highly modified Toyota pickups from 30psi to just 3psi, flattening their sidewalls until their footprints were more than twice their normal width and three times their normal length.
Quite right.This is just to pop the tyre onto the bead. Once there, you can inflate it with a small on-board compressor.