Yes, if your comment is strictly read, you are right that your are allowed to scream fire in a crowded space

I think that the "you are not allowed to scream fire" argument kinda implies that there is not a fire and it creates a panic which leads to injuries

I read the wikipedia article about brandenburg, but I don't quite understand how it changes the part about screaming fire in a crowded room.

Is it that it would fall under causing a riot(and therefore be against the law/government)?

Or does it just remove any earlier restrictions if any?

Or where there never any restrictions and it was always just the outcome that was punished?

Because most of the article and opinions talk about speech against law and government.