In reverse order:

1 - it needs to be tranported

2 - it needs to compressed and cooled, in order to transport it. You need to cool it down around 1700 degrees, because:

3 - methane pyrolysis is done at around 1500 degrees C, getting something that hot isn't free.

4 - methane isn't the only component in natural gas, so you need to seperate out all the impurities.

5 - methane is a very strong contributor to global warming, so any natural gas leak from the drill to the factory adds co2equivalent.

6 - you need to extract natural gas from the ground and transport it, which takes energy.

I think the issue is where the energy to heat the reaction vessel comes from. The video shows green sources, but that isn't the only way to do it. The thing is, this is ultimately an energy storage tech rather than an energy generation tech. You need excess capacity to make it work, and if that means you have to make up for a shortful with conventional generators elsewhere, you aren't actually saving anything.

I don't know if the previous poster is right of course, but the planet is an almost closed system, and there really is no such thing as a free lunch when it comes to energy.

Burning natural gas isn't so awful but getting it out of the ground and to the place where is needs to be burned is always overlooked. It's a gas, it wants to escape and much of the infrastructure leaks and so a great deal is lost before its used. I walk around Boston and no joke you just SMELL it all the time because the infrastructure is so old. Natural gas is also mostly methane which when leaked is 80 times more potent than CO2. Furthermore much natural gas needs to be transported on ships to be uses. To summarize there is no 'greener' fossil fuels it's all to be avoided if possible.

Cleaner than coal is a very low bar. 60% of the emissions of coal is still way too much

Sure, the primary dutch co2 source website: https://www-co2emissiefactoren-nl.translate.goog/lijst-emissiefactoren/?_x_tr_sl=nl&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp

Translated, because nobody speaks dutch.

That's the states for actually burned natural gas. Natural gas is basically methane and is therefore not too good for the climate when it leaks (which it does)

It does result in higher methane emissions, which have a ln ~30x larger greenhouse effect than CO2.

See here: https://youtu.be/K2oL4SFwkkw

Edit: Looks like metane's GGG co2 equivalent is 27 to 30 over 100 years.

https://www.epa.gov/ghgemissions/understanding-global-warming-potentials

Electrolysis, it works but it takes a lot of energy to produce, so burning hydrogen from this would be a fools errand.

Is this a real question? It's methane, ethane, propane and butane, mixed with carbon dioxide, and we get it from underground.

Natural gas is a byproduct of ancient organic material being buried and slowly cooked by the earth's heat. The hydrocarbons of the plant break down, and the gas rises. Under certain conditions, it gets trapped below non-porous rock and builds up.

Basically, all fossil fuels are Carbon fixed from CO2 by plants, then trapped underground. The solid material we call coal, the liquid oil and the gas natural gas.