Okay,

Probably understood that chemistry isn't everybody's cup of tea. For the most part when a gas (Oxygen, Nitrogen, Methane, etc.) is stored in a cryogenic state, it is stable and has no risk of explosion or burning.

BUT

Boil off... Cryogenics will start to boil and will return to their gaseous state. Therefore will have the same danger as previously had.

Little Fun Fact... That is why commercial and military aviation utilize liquid oxygen in cryotainers. Stable in Cryogenic form, but will mix with outside air to return to the 20% O2 mixture.

This video appears that this was unsafely transporting the Gas. Don't really speak Chinese, so I can't say if it was in a cryogenic state or compressed state. But this appears that they were hauling it in an unsafe manner. We are required to have safety pressure valves in the US. (sometimes they do fail. https://youtu.be/FG1LGKieTxY Acetylene Explosion on the Highway in Dallas I believe) Per current Federal Laws. Any truck that is placarded as carrying a compressed gas must stop at all railroad crossings.

So I hope this helps. All we can due is take precautions to reduce the risk.