yes, smoke is present

that's because when you burn carbon based fuels

they tend to smoke

so the fuel that is creating thrust

2:24 to 2:28

no movement

also happens to be creating smoke because it's basically a kerosene fire

until gas is ejected and pushed on

I haven't watched the video but I assume that you are watching a space ship launch off from the ground right

Regardless, the vacuum is an inequivalent comparison to space

you can see the rocket move the second the jet stream appears @Rigg5

You're not comparing apples to apples

?

I mean

And yes, to an extent

Nope

if it needed a medium to move

it would have the atmosphere to push off of so

it’s not a perfect vacuum

Space is 10 to -17 tor value

smoke isn't necessary

space isn't a perfect vacuum

extreme pressure differential

no large area in the universe is

no but there's not a huge difference in pressure

simply put

if you go up to 100km

which is around where space is agreed to begin

but still has a thin atmosphere

it's not like

the air is pressurized at one atmosphere

and then immediately switches to a near perfect vacuum

^

There is stuff

Then there is less stuff

gravitational attraction pulls gases toward the earth, and the compression forces from the gasses on top

Then there is no stuff

provide higher pressure at sea level

That’s how our atmosphere works

and with less gas on top the higher up you go, the lower the pressure

in fact, the earth's atmosphere may extend, at an indescribably small thinness, hundreds of thousands of kilometers away from sea level