The above mentioned meanings are what you need to know; however, not here! Here, the expression "Dead on One's/Its Feet" means 'no longer useful'. So, your sentence would mean: "That movie is dead on its feet" = "That movie is No Longer Useful."

It's a short way of saying that someone looks so tired that if they weren't standing, one could swear they were dead. Hence, "dead on their feet".

Dead on its feet I would say is "tired"