Uh, liquids are not solids and state of matter effects combustion. I've put out lighters and cigarettes in buckets of gas before.
You can roll up dried grass and stick it in a fire piston and start it on fire. you can't do that with a drop of gas. Just like compressing liquid won't cause it to get hotter like compressing gasses will.
Basically, this video is in error in it's testing methods.
Mom's comin' 'round to put it back the way it ought to be.
Anyone that thinks war is good is ignorant. Anyone that thinks war isn't needed is stupid.