system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If a rocket launched into space streams continuous video back to the earth, what will happen once the rocket gets so far away that we don't receive the broadcast signal instantaneously any more?

I can't grasp my head on this problem.

If we want to reach a sattelite far away, it can take up to 10 minutes for our command to reach the sattelite. Then it takes another 10 for the sattelite's response to reach us.

If we would launch a rocket livestreaming onboard video, what happens once the rocket starts to get so far away it would take 10 minutes for the broadcast to reach Earth?

We'd be watching from Earth constantly, but the rocket at one point can't reach us instantly. Would we see slow motion video or something?
gpt
Well there's not a *point* it will reach where it won't be live. It will *never* be footage of what the spacecraft is seeing at that exact instant. The spacecraft could be 10 feet away from you sitting still and if your buddy was watching the footage in the next room over there would be an *extremely* small delay. Like what he saw on his scree would be like 0.0000000001 seconds behind what was really happening.

As you move the camera farther and farther away this delay would simply increase over time. There's no *point* where it suddenly stops being live, it's never live. This is due to the fact that light has a speed and it takes (a very small amount of) time for light or signals to go anywhere.