I get that wasn't a totally serious question, but I can give a serious answer: not a gas explosion.

There is insufficient volume within the RV even for an gas/air mix to cause the effects seen in the photo evidence. So not camping gas or vapor produced by the boil off process in meth production.

Even Acetylene/Oxygen or Hydrogen/Oxygen would struggle unless there was a secondary pressure capable mixing chamber within the RV. (And due to the high likelihood of spontaneous reaction prior to intended initiation, this type of device is incompatible with the timer / warning system).

I would also doubt traditional FAE devices. There is no fuel mist dispersal in the video, and too many curtains and awning fabrics are unburnt.

The photos indicate a high heave/low brizzance material, ie: not HE. There is little cratering, significant blast overpressure at distance, and evidence of powerful suck-back due to the position of the fallen trees.