Massive explosion hits Russian Gazprom gas pipeline amid suspicions of sabotage linked to Putin's wa

[ProfessorGAC]

15. I'm Not Seeing What Your Seeing

First, as the video begins the fire already exists. Cars could have stopped to watch.
Secondly, smoke is not a good indicator in this case. If this is a natural gas pipeline is almost all methane & ethanol. These both are extremely efficient combustion reactants, so 99.9% of it has converted to CO2 & steam.
The steam near the plasma is still too hot to condense and form a cloud of water droplets. As the flame surges, that interface of condensation would be moving so exactly how much "smoke" we see is not a constant.
Since there is only a minute amount of unsaturated hydrocarbon in that stream we will see little to no visible smoke.
In forensic training sessions for chemical plant disasters, I've seen lots of incident videos, and this looks fairly typical to me. Without seeing the instant to ignition, we can't really conclude much from this video.