What does "as a silver sky stops" mean in these lyrics?

English native speaker here, I'm not too sure. It's not a pre existing phrase. I guess a cloudy sky could be described as silver in colour, and maybe when the wind pauses the sky stops appearing to move. If it's a metaphor, I don't get it!

So she lives in a cloudy area, so the clouds are grey. But at the edge of a cloud, sunlight usually peaks through. This is called the silver lining. Like the little bit of good in a bad situations. So where the clouds stop is where you see this silver lining. So the clouds are silver, bad. But where the clouds stop is the silver lining, good. She wants to leave where she's from and move past the cloudy area to where the silver lining is. That's her wish

I've never heard the phrase before, but I have some guesses: \* we often say 'grey sky' for when it is very cloudy, so I'd assume 'silver sky' means the same. \* clouds move, but I suppose if they move very slowly, or it is so cloudy that it seems uniformly cloudly regardless of time passing, you could exaggerate and say the sky has stopped But I'd probably want to wait for the movie to come out so that we can hear the whole song in-context, rather than speculating further with just this 1 minute clip that seems to be in the middle of the song.