To clear up the confusion, the engine in the warthog is a 12-liter V8 engine optimized for Hydrogen combustion. (Any otto-cycle engine today can run on hydrogen, keep in mind) The most obvious solution for its strange suspension translating to a drivetrain is that it uses an electronic drivetrain, as opposed to a physical one.
That is, instead of a transmission, the engine couples to a large, electric generator. The generator then feeds electricity through wires to separate motors in each suspension arm, that directly couple to the wheel hubs. When more throttle is applied, the generator creates more electricity, which in turn, spins the wheels faster. There are some little bits, along the way, but this is just the concept. Doing this makes the vehicle much lighter and more robust. (Fewer moving parts)
This is supported by facts about the Warthog. It is stated to have an infinitely variable transmission. This is used to refer to any transmission that allows for any wheel speed, while the engine remains at a fixed speed in its power band. Some designs for IVTs involve variable-tension v-belts, but these are more akin to CVTs. An electric drivetrain allows for infinite variability.
While Bevbor's model is physically possible, and rather novel, it is unlikely to be the actual design, based on what has been said about the M12 FAV.
As for the hydrogen issue, in the future, oil ran out and people got smart. Current ICEs can run on hydrogen, which has a lower energy/molecule ratio, but a higher energy/weight ratio, and is easy to produce. (Not to mention infinitely renewable and clean) The only reason most vehicles today don't use hydrogen is because there's no infrastructure in place to supply it. (Or produce it by the billions of gallons)
As far as storing it safely and affordably, for years, people have used propane-powered vehicles, and nitrous-oxide-enhanced fuel systems. Both those systems use tanks filled with pressurized liquid gases. There's precedent for this, just no infrastructure. And that's what needs to be created, otherwise, we're gonna run out of fuel, and World War III won't even be able to start because there'll be no way to power anything.