My (very limited) experience - I watched as a friend's dad helped fix a puncture on a trailer tyre many years ago. He had a pneumatic version of my manual tyre changing machine - from memory there was only pneumatic cylinder action serving to hold the wheel in place (and guess maybe had bead breaker function too? Tyre had done that itself in the short distance it ran flat (trailer was full of clay soil at the time, so we ignored the puncture whilst got it in position to empty at the farm - maybe 15-20 metres of sub walking pace manoeuvring the trailer to emptying position was enough to break the bead very effectively!) Having shovelled out, cough cough, definitely no more than the 400kg capacity of said trailer, we could then more easily get it off the ground and attend to the wheel.
No tube, tyre was plug / patched from memory, but once put back on the rim we'd heck of a job to get it to do the described very loud POP! POP! of getting it reseated both sides. In the end think we'd a ratchet strap around the perimeter and the valve core out to try and allow as swift flow in as we could get from the compressor. This was remote in an adjacent workshop/barn so the losses on route hindered us.
I was just along for the ride as a spectator (said mate's father is a farmer's son and does this sort of stuff as easily as tie his shoe laces. Sort of turn his hand to anything much as most farmers seem to do / have to be able to do) I think that damned wheel came close to beating him that night (was already end of a long day when the puncture happened, the third or fourth trailer run of the day I think. Light fading and ready for something to eat when PPSSSSSSSTTTTTTTTTTTTT! ) but he's not one to give up even if we'd had been there all night!
Anyway, if I've wasted £3.27 then I'm not too heartbroken
A very good read Matt, much enjoyed 
IMO, much better to read it rather than watch it on a Youtube. But then as you know, I'm no great fan of Youtube...
