We’re inside an inflating balloon and the space inside is a giant gobstopper where each layer is spherical movie projector screen we can watch a movie on of different moments in time.

If we’re not literally on the edge of the balloon is someone else looking back in time at us?

That's true except also every other point in space is at the center of its own balloon. The balloon has no edge, the movies just become too dark to see past a certain distance.

Too dark and yet also too bright: the fun combination of a plasma so hot and bright it's opaque being redshifted so hard it's the darkest blackest void anyone has seen.