The video is created using Phoenix FD 3.0, but the text version of the tutorial is updated and uses Phoenix FD 4.30 Official. In any case of doubt you may refer to the text.
Another way to create a Gasoline Explosion is to use the newer and improved version of the Gasoline Explosion Toolbar Quick Setup preset which is included in the Nightly Builds since 16 Sep 202020.
System Units Setup
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Scale is crucial for the behavior of any simulation. The real-world size of the Simulator in units is important for the simulation dynamics. Large-scale simulations appear to move more slowly, while mid-to-small scale simulations have lots of vigorous movement. When you create your Simulator, you must check the Grid rollout where the real-world extents of the Simulator are shown. If the size of the Simulator in the scene cannot be changed, you can cheat the solver into working as if the scale is larger or smaller by changing the Scene Scale option in the Grid rollout.
The Phoenix FD solver is not affected by how you choose to view the Display Unit Scale - it is just a matter of convenience.
Go to Customize → Units Setup and set Display Unit Scale to Metric Meters.
Also, set the System Units such that 1 Unit equals 1 Meter.
