Complex sentence: Because her international fame was triggered by moving images, she is a watershed figure in the history of modern celebrity, and as one of silent film's most important performers and producers, her contract demands were central to shaping the Hollywood industry.
Split into simpler sentences: Because her international fame was triggered by moving images, she is a watershed figure in the history of modern celebrity. And as one of silent film's most important performers and producers, her contract demands were central to shaping the Hollywood industry.