the universe is finite

My YouTube viewing list (and also my subscriptions, now that I've actually started subscribing to stuff) is predominantly science-y content (with the odd aviation, coffee and motoring stuff that creeps in). Last week was particularly physics-y though. So much so that I had an astrophysics dream! The dream was of the universe being a cube (strange, because everything we know points to it being spherical or spheroidal), but the stranger bit was what was happening inside the cube:

The cube was initially entirety and uniformly lit bright, and then suddenly seemed to undergo an implosion of sorts, after which it went from bring brightly and uniformly lit, into being filled with rapidly shrinking specs of light. It remained a cube throughout, but the contents of the cube were changing. 

When I woke up and had a thought about it, I realized it was a different way of looking at the universe. A finite universe.

And that's when it struck me: the total mass and energy of the universe has been and will be constant. The universe seems to be expanding very quickly, but that expansion is a function of time. If one was to use time as a scaling factor of the universe, it doesn't seem infinite at all.

The universe was never born, and will never die. It's just constantly being scaled by time. In fact, could it be that the only scaling happens in our perception?

I need to ask a physicist.