The Question and Answer section for The Truman Show is a great resource to ask questions, find answers, and discuss the novel.
Sylvia was an acctress on the Truman show. She later becomes part of a "Free Truman" movement.
The product placement becomes a part of the storyline. The placements are not very subtle. At one point Truman's wife brings home groceries and advertises a "chef's pal" vegetable grater. At another time she advertises a coca drink.
LOw angle shots are usually used to emphasize power. I might consider that Christof would have low angle shots.